Framing, equivalence, and rational inference.

Bermúdez's case for rational framing effects, while original, is unconvincing and gives only parenthetical treatment to the problematic assumptions of extensional and semantic equivalence of alternative frames in framing experiments. If the assumptions are false, which they sometimes are, no valid inferences about "framing effects" follow and, then, neither do inferences about human rationality. This commentary recaps the central problem.