# Ignorance prior

From Lesswrongwiki

Revision as of 23:41, 16 January 2011 by Vladimir Nesov (talk | contribs) (link to wikipedia article)

An **ignorance prior** is a prior probability distribution where equal probability is assigned to all possibilities. For instance, at the beginning of a Monty Hall game, the player has no information about which of the three doors has the car behind it. Thus they should assign 1/3 probability to each.