 As usual, let \(W\) be a set of possible worlds. The agent is taken to be interested in answering a  question  \({\bf Q},\) which is a partition of \(W\) into a finite collection of mutually exhaustive answers \(\{ H_1, H_2, \ldots H_n\}.\) Levi calls situations of this sort “efforts to replace agnosticism by true belief,” echoing themes in Peirce (1877):