"Delusional thinking" is a pretty broad umbrella. There's nothing that's fundamentally incompatible with a delusional thought process per se, but the particula

"Delusional thinking" is a pretty broad umbrella. There's nothing that's fundamentally incompatible with a delusional thought process per se, but the particulars might be a problem. In Terry's case, it sounded like he suffered from a lot of delusions of persecution (e.g. thinking the CIA is after him), and religious delusions. Neither of these are fundamentally incompatible with any sort of technical or scientific thought process. Had he not been delusional, I suspect we might either never have heard of him, or he'd be one of the people making the front page of HN on a semi-regular basis.