Tuesday, 13 September 2011

SEPT 13

proof that is not valid

summary:
a single error in reasoningwill break down the logical argument of a deductive proof. this will result in an invalid conclusion, of a conclusion that is not supported buy the proof.
trying to divide by 0 will always cause a proof to be wrong, leading to an conclusion that is also wrong. also try avoid circular reasoning. when you write a proof try to keep is that it don't take a rocket scientist to make sense of it.

an example of to days work:
identify the error: all squares have 4 right angels. Quadrilateral PQRS has 4 right angels. therefore, PQRS is a square.

answer: not true quadrilateral PQRS could be a rectangle

Next is Joel

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