Sentence:  He knows all the stuff that Arthur Schlesinger Jr., knows, keeps picking up brand new, ultra-contemporary stuff that nobody else knows, and arrives at <WSD>zonky</WSD> conclusions couched in scholarly terms. 
Meaning of the word marked with <WSD> tags:  Weird, odd, eccentric.<ref>John Ayto, "The Oxford Dictionary of Slang", Oxford University Press, 1998, p. 427,[https://archive.org/details/oxforddictionary00john]</ref>