From: brannen (brannen@lookingglass.net)
Date: Fri May 27 2005 - 23:57:38 MDT
Somebody wrote:
>>Here's an example, then. Let's suppose we know that
>>A, and we know that A->B. This can also be written as:
>>
>>P(A) = 1 and P(B | A) = 1
>>
>>So using deductive reasoning:
>>
>>A
>>A -> B
>>-------
>>B
>>
The normal definition of Material Implication is:
A B A -> B
1 1 1
1 0 0
0 1 1
0 0 1
(See any introductory work on Logic)
What was said in the original post was:
B =! A ; where '=!' symbolizes Identity Equality (as I don't have
the symbol
available.)
Andy
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