New in paperback. Hardcover was published in 2014. Peter Ludlow shows how word meanings are much more dynamic than we might have supposed, and explores how meanings are modulated (changed) even during the course of our everyday conversations. The resulting view is radical, and Ludlow shows that it has far-reaching consequences for our political and legal discourse and also for some of the deepest and most intractable puzzles that have gripped English-language philosophy for the past 100 years - including puzzles in the foundations of semantics, epistemology, and logic.