Under Levi's and Walley's imprecise probability frameworks, a strategy counts as admissible when it is a best response to some measure within a credal set, dissolving the strict full-support requirement in P2.
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P2(Provides the truth conditions for proposition (7), identified as proposition (7): George Bush does not exist.)
The principle that proposition (7) is true if and only if George Bush does not exist — a modalized instance of the Tarski truth-schema 's is true iff s'.
Walley, Peter(as a developer of imprecise probability frameworks)
A statistician and philosopher who created mathematical methods for dealing with situations where you can't pin down exact probabilities.
best response(Implicit in the definition of strict domination)
A strategy s_i is a best response with respect to a probability measure p over opponent strategies if it maximizes the player's expected utility given p.
imprecise probability(failure conditions for the unique fair price presupposition)
A state in which a person's probability for an event E is not a single sharp value, resulting in a selling price that differs from the buying price or a range of acceptable fair prices rather than exactly one