 As it is standardly presented today, Curry’s paradox afflicts “naive” truth theories (those featuring a “transparent” truth predicate) and “naive” set theories (those featuring unrestricted set abstraction). This section will explain how each kind of theory can give rise to Curry sentences. We start, however, with a version that concerns theories of  properties, a version that more closely resembles Curry’s formulation. (The supplementary document  Curry on Curry’s Paradox  briefly characterizes the targets of Curry’s own versions of the paradox.)