A common observation in placebo studies is that definitional disagreement is rife. Philosopher and historian of science Robin Nunn recently argued that "Nobody who came and saw the placebo has conquered its definition". Nunn insists that "the placebo construct conceals more than it clarifies," and that we need to prepare for "a post-placebo paradigm". Pronouncements that disagreement is endemic are often the prologue for new definitions of placebo and "placebo effect": for example, in the opening of a recent philosophical paper (...) on the issue, Jeremy Howick observed that debates about placebos "rage," and that "there is currently no widely accepted definition of the 'placebo'".... (shrink)