1889-1951 1902-1994 1924 1924-1994 1952- 501 biography congresses feyerabend friendsandassociatesreagan history imre irrationalism(philosophy) jim lakatos ludwig measurement paradigm(theoryofknowledge) paul paulk philosophy popper presidents q175f968t2000 q175s889p1982 rationalism ronald science skepticism socialsciences staff thomass unitedstates wittgenstein