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uh yeah proving that random cnf is unsatisfiable okay great um yeah so just interrupt me whenever you have questions i made slides because im going to give a more general talk about this simons in a couple weeks so yeah especially if you have any comments let me know either during or after yes i want to talk about a random random instances of unsat formulas and uh how hard or why is it hard to prove them even though theyre in abundance okay so first of just some basic background uh so unset just define that to be the set of all unsatisfiable cnf formulas and were going to define a proof system propositional proof system for onset as it was defined by cook and wreck house so that it basically is general enough to include any np algorithm so the way they defined it is a basically checks to see if something is a proof so its a its a polytime algorithm p that takes strings to unset formulas and you should think of p as taking an encoding of a proof in some standard proof system and