Principle of indifference
In probability theory, a rule for assigning epistemic probabilities / From Wikipedia, the free encyclopedia
The principle of indifference (also called principle of insufficient reason) is a rule for assigning epistemic probabilities. The principle of indifference states that in the absence of any relevant evidence, agents should distribute their credence (or "degrees of belief") equally among all the possible outcomes under consideration.[1]
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In Bayesian probability, this is the simplest non-informative prior.