what are the 4 fundemental laws of logic?

Answer 1

1) contradiction
2) excluded middle
3)principal of identity
4)nonidentity

Answer 2

there are four ways of testing logic, and perhaps this is what you are looking for.

1. Empirical Truth

This can be stated as a syllogism.

Ed is a Methodist.
All Methodists are Protestant.
Therefore Ed is a Protestant.

In other words, there can be no other alternative to the first two propositions.

2. Inherent Nature of Things

The known world contains certain truths that can not be disputed. For example, rain is wet.

3, Isomorphous Conditions

Certain things can exist outside our frame of reference or understanding. But, our minds cannot deal with contradicitions; like, Can God create a rock bigger than he can lift. If it is a given that God is all powerful, then he can do anything. However, it is beyond the power of our understanding to conceive of a rock bigger than an all-powerful entity can not lift.

4....Verbal Conventions

Because we express our thoughts in words, verbalized ideas must be consonent. Black and Not-Black can not be discriptive of the same object.

I hope this helps.

Answer 3

traditionally, the three fundamental laws of logic: (1) the law of contradiction, (2) the law of excluded middle (or third), and (3) the principle of identity. (4)The four-law chronotopological logic is theoretically capable of resolving every present three-law paradox.