Quiz 1 bonus question 11
• “At least half of the people taking this quiz will label
this statement ‘true’.”
– 9 out of 9 answered “true”!
– Everyone was right!
– If everyone had answered “false”, that would have been
right, too…
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# true
pure-strategy equilibria
• A (symmetric) mixed-strategy equilibrium:
everyone plays “true” with probability ½
Quiz 1 bonus question 12
• “At least half of the people taking this quiz will label
this statement ‘false’.”
– 5 out of 9 answered “false”
– Those 5 were wrong, because they made the statement
true.
– Of course, there had to be at least 5 wrong answers
(why?), so overall the class did as well as it could have…
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9 # false
pure-strategy equilibria
• A (symmetric) mixed-strategy equilibrium:
everyone plays “true” with probability ½