Capgras syndrome is a strange disorder in which the sufferer becomes convinced that someone close to them has been replaced by an impostor.
Yet now, a new and even stranger variant of the syndrome has been reported – “Cat-gras”. This is the name coined by Harvard neurologists R. Ryan Darby and David Caplan in a new paper in the journal Neurocase. The authors describe the case of a man who believed that his cat was in fact a different cat.
According to Darby and Caplan, the patient