Peter Thomas Geach was a British philosopher and professor of logic at the University of Leeds. His interests were the history of philosophy, philosophical logic, ethics, philosophy of religion, and the theory of identity.
really enjoyed this!! it's a peer at an era of strangely informal logic—informal in the sense that it isn't all a matter of setting out logics and models and so on as modern logic books seem to be—almost close to grammar. this made it a real pleasure to read at times. i do feel i let lots of the central logical doctrines slip by though, which docks it a star i perhaps owe it. in fact it only dawned on me a few pages from the end that one of the central doctrines, that of the incompleteness of absolute identity claims without the supplication of some sortal under which things are relatively identical, was indirectly related to the defence of the doctrine of the trinity. gorblimey!