In like in cathart syndrome the classic thing is a person has it's usually a result of some brain injury encephalitis although it has also been described in psychiatric context. The people have a strong sense that they're dead and you couldn't convince him that it wasn't so he actually believed that someone had stolen his table. I think what was finally led me to this idea about mental sensations as coloring your cognitive behavior. You need to somehow saturate their neural networks with a new set of sensations and that doesn't seem to occur through logical analysis and discourse.