Friday, February 27, 2009

Deductive reasoning

Modus Ponens
-positive if then statement
-If p, then q
-p then q
-is positive
If i swim well, then i am hot
I swim well therefore i am hot

Modus Tollens
-negative if then statement
-If p, then q
-not q
-Therefore, not p
-If premise p is true, then premise q is also true.
-Premise q is false
Therefore, premise p must be false.

If i swim then i am hot
I dont swim well so im not hot

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