5 5 0 10 10 0 1 1

Dilemma

Prisonerrsquos

The

Or why cooperation makes people better off

Tom Jerry

Herersquos two prisoners Tom and Jerry

Tomrsquos told

ndash Herersquos the dealhellip

(Yeah Jerryrsquos offered the same deal)

(1) If you rat each other out

then each of you will serve 5 years in prison

5

(1) If you rat each other out

then each of you will serve 5 years in prison

You rat Jerry out

5

Jerry rats you out

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

0

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

You rat Jerry out

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

Or why cooperation makes people better off

Tom Jerry

Herersquos two prisoners Tom and Jerry

Tomrsquos told

ndash Herersquos the dealhellip

(Yeah Jerryrsquos offered the same deal)

(1) If you rat each other out

then each of you will serve 5 years in prison

5

(1) If you rat each other out

then each of you will serve 5 years in prison

You rat Jerry out

5

Jerry rats you out

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

0

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

You rat Jerry out

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

Tom Jerry

Herersquos two prisoners Tom and Jerry

Tomrsquos told

ndash Herersquos the dealhellip

(Yeah Jerryrsquos offered the same deal)

(1) If you rat each other out

then each of you will serve 5 years in prison

5

(1) If you rat each other out

then each of you will serve 5 years in prison

You rat Jerry out

5

Jerry rats you out

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

0

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

You rat Jerry out

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

Tomrsquos told

ndash Herersquos the dealhellip

(Yeah Jerryrsquos offered the same deal)

(1) If you rat each other out

then each of you will serve 5 years in prison

5

(1) If you rat each other out

then each of you will serve 5 years in prison

You rat Jerry out

5

Jerry rats you out

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

0

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

You rat Jerry out

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

(Yeah Jerryrsquos offered the same deal)

(1) If you rat each other out

then each of you will serve 5 years in prison

5

(1) If you rat each other out

then each of you will serve 5 years in prison

You rat Jerry out

5

Jerry rats you out

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

0

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

You rat Jerry out

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

(1) If you rat each other out

then each of you will serve 5 years in prison

5

(1) If you rat each other out

then each of you will serve 5 years in prison

You rat Jerry out

5

Jerry rats you out

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

0

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

You rat Jerry out

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

5

(1) If you rat each other out

then each of you will serve 5 years in prison

You rat Jerry out

5

Jerry rats you out

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

0

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

You rat Jerry out

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

0

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

You rat Jerry out

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

0

(2) If you rat Jerry out and Jerry remains silent

then you will go home free and Jerry will serve 10 years in prison

You rat Jerry out

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

10

(3) If Jerry rats you out and you remain silent

then you will serve 10 years in prison and Jerry will go home free

Jerry rats you out

0

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

1

(4) If you and Jerry both remain silent

then both of you will serve 1 year in prison

1

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

rat Jerry out remain silent

What should Tom choose

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

rat Tom out remain silent

(And what should Jerry choose)

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

From the outsiderrsquos perspective

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

5

(1)

Tom rats Jerry out

5

Jerry rats Tom out

(2)

(3) (4)

0

Tom rats Jerry out

10

10

Jerry rats Tom out

0 1 1

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2 0 10 (2) + = 10

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

5 5 (1) + = 10 10 0 (3) + = 10

1 1 (4) + = 2

2 lt 10 Which means they would be better off

if they both cooperated and remained silence

(Both of them would serve 1 YEAR in prison)

0 10 (2) + = 10

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

From Tomrsquos perspective

(the same is true for Jerry)

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

I rat Jerry out

Jerry rats me out

(1) (2)

5 0

If I rat Jerry out

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

10 1

(3) (4)

If I remain silent

Jerry rats me out

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

5 0 + = 10 1 + = 11

If I remain silent If I rat Jerry out

5

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

5 lt 11 That is if Tom and Jerry are purely rational persons

they will surely rat each other out

(And both of them will serve 5 YEARS in prison)

5 0 + 10 1 + 11 = =

If I remain silent If I rat Jerry out

5

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

Buthellip

1 YEAR in prison is better then 5 YEARS in prison

That is the guys should have cooperated

Conclusion

In the end of the day

Cooperation makes everyone better off

Conclusion

In the end of the day

Cooperation makes everyone better off

In the end of the day

Cooperation makes everyone better off

Embrace Cooperation

Thank You S H A R I N G

Follow Alex Hint on g+

Texture credit Lonnon Foster