7 Bruce Lee's Views on Reasons in Life

Logic's central problem is the distinction between correct and incorrect argument.

Logic deals ONLY with declarative sentences, i.e., sentences used for the purpose of making some claim or assertion about the world.

Propositions are either true or false and can be either affirmed or denied.

A valid argument is one in which all its premises are true and, hence, its conclusion is true.

An invalid argument is one that is not valid because not all of its premises are true.

An analytic proposition is a proposition which is necessarily true because its denial is self-contradictory (e.g., all barking dogs bark).

7 Bruce Lee's Lessons on Concentration

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