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okay last time we saw the sequin calculus for first order logic and I think I mentioned this already gives us a basis for implementing first order logic a guy at IBM named how Wang uh built a theorem prover for first order logic which was able to prove if Iamp;#39;m not mistaken something like 400 theorems all the theorems mentioned in pipia Mathematica that were pure logic and it did it in some tiny amount of time like under a second for all 400 um I should mention the computer was an IBM 704 which like all computers of the 1950s was coal fired so while it was running your program you needed a guy called the fireman who would be shuffling coal into the Firebox and of course if the coal ran down the computer would run slower and slower and so it was a very really a tremendous achievement that he could prove all those theorems so quickly so you might think okay problem solved for first order logic well no um so the fact is although it was great on all those problems um is it a thing ab
