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Quote:
![]() Let's try and translate those sentences into logically equivalent ones: (1) If the ball is dead then a foul is not personal (2) If a foul is personal then the ball is alive Let's write A for "a foul is personal" and B for "the ball is alive". Then (1) becomes "If (not B) then (not A)", while (2) becomes "if A then B". Now it's well known that "If P then Q" is logically equivalent to "(not P) or Q". Then (1) is logically equivalent to "(not not B) or (not A)" while (2) is equivalent to "(not A) or B". It's now sufficient to remember that "(not not B)" is equivalent to "B". I've shown that the two sentences say exactly the same thing and it cannot happen that one is false and the other is true. Another proof that math is useful. ![]() Ciao |
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Thread | Thread Starter | Forum | Replies | Last Post |
THIS is a personal foul. | Dan_ref | Basketball | 15 | Thu Feb 21, 2008 02:04pm |
Personal Foul, then Technical Foul | jdw3018 | Basketball | 7 | Sat Dec 02, 2006 05:35am |
Personal Foul | fonzzy07 | Football | 3 | Fri Sep 08, 2006 07:59am |
Personal foul? | glt1958 | Football | 11 | Fri Sep 02, 2005 12:21pm |
Simultaneous Personal Foul | shawnwil | Basketball | 15 | Tue Nov 12, 2002 06:23pm |