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 You guys are Cornell students, come on. I expect this from Harvard students, but not from Cornell students. 
		   — Dexter Kozen, 
		   complaining about grammatical errors in proofs 
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			 Nov. 13, 2015 
		  
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 Let me explain that expression. Let me not explain that expression. 
		   — Dexter Kozen, 
		   using confusing expressions in an algorithm. 
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			 Nov. 6, 2015 
		  
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 Anything's allowed. This is mathematics! 
		   — Dexter Kozen, 
		   explaining why his proofs work. 
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			 Nov. 2, 2015 
		  
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 For 5 we have an n^5 algorithm, but for other values of 5... 
		   — Dexter Kozen, 
		   on the difficulty of the clique problem. 
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			 Oct. 9, 2015 
		  
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 How about Bayes Watch? 
		   — Dexter Kozen, 
		   Response to Alex Niculescu's plea for title suggestions for his untitled B-exam talk on Bayesian networks. 
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			 June 9, 2008 
		  
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 I have to tie my shoe.  In rugby, you say "minute, please".  Actually you usually say that after you've been punched in the face. 
		   — Dexter Kozen
		    
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			 Nov. 7, 2006 
		  
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 I have no idea why this does what it does, but I'll write it down and maybe you can tell me. 
		   — Dexter Kozen, 
		   When writing up a formula belonging to Dedekind complete Temporal Logic. 
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			 April 9, 2003 
		  
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 Student:  "It doesn't seem like bulldozing since you aren't destroying things.  It seems more like stenciling because you are making copies..."
Dexter:  "Makin' cop-a's.  Have you seen that SNL skit?  No? Nevermind." 
		   — Dexter Kozen, 
		   while lecturing about Completeness of Temporal Logic, which includes a technique called "bulldozing". 
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			 April 9, 2003 
		  
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 My notes say this is trivial, so let's stare at it and see why it's trivial... Yeah, it's trivial. 
		   — Dexter Kozen, 
		   Why proving a lemma on quasi-orders, in CS 686. 
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			 April 2, 2003 
		  
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 A computer scientist is a mathematician with a job 
		   — Dexter Kozen, 
		   advice to Alexei Kopylov, circa 2003 
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			 March 1, 2003 
		  
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