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數學導論(完)

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一零

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Sanbert Wong
Sanbert Wong

haha, I see, I missed the last line, sorry about that😂

一零
Author 一零

The statement actually is “P=>Q” if and only if P is false or Q is true.
You can check again, and the statement can be observed by truth table.

Sanbert Wong
Sanbert Wong

On page 4

Sanbert Wong
Sanbert Wong

Sorry, I have doubt the statement " "P=>Q" is true if and only if P is false.

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