Do you guys think there is an S-N thing involved in how well you understand these problems?
Originally Posted by ptgatsby
I think pt is just used to using Bayes' Rule (considering he was just explaining what he meant by an '->' essentially using Bayes' Rule in an other thread).
The concepts of modus ponens and modus tollens were exposed to me in second or third grade due to being in the "Gifted" program (talk about a self-fulfilling use of IQ), so I just got used to thinking about things that way.
I would also guess that people who spend a lot of time in the realm of pure logic: mathematicians, computer scientists, philosophers, etc., are much more likely to find the card problem "natural" (Though only 1 out of 19 software candidates got it right-- We hired him, but not for that reason alone. Makes me wonder if I should have put that problem on the interview when we first started).
Another little puzzle:
A couple (say pt and Non) invites 10 other couples to an engagement party. pt asks everyone present, including Non, how many people they shook hands with. It turns out that everyone (except perhaps pt, since he didn't ask himself) shook hands with a different number of people. If we assume no one shook hands w/ his or her partner, how many people did Non shake hands with?
Hope I wasn't to presumptuous in using your names in the puzzle.
Congratulations Non and pt.