The quest to achieve the impossible fuels creativity, spawns new fields of inquiry, illuminates old ones, and extends the frontiers of knowledge. It is difficult, however, to obtain a patent for an invention which seems impossible, incredible, or conflicts with well-established scientific principles. The principal patentability hurdle is operability, which an inventor cannot overcome if there is reason to doubt that the invention can really achieve the intended result. Despite its laudable gatekeeping role, this Article identifies two problems with the law of operability. First, though objective in theory, the operability analysis rests on subjective credibility assessments. These credibility assessments can introduce a bias toward unpatent...