A philosophical movement — started by Bertrand Russell — whose goal is to find the hidden truth values in statements.
For example, the proposition "The heir to the Canadian throne is bald" is neither true nor false, as stated.
But it can be clarified by breaking it into two statements:
(1) There is an heir to the French throne.
(2) He or she is bald.
Doing this allows you to properly assign a truth value to (1) — it's false, thus statement (2) becomes irrelevant.
1. Russell believed that many of the nagging problems that have persisted throughout the history of philosophy (e.g. the debate over substance and essence) could be resolved using this type of analysis.