What is logic?

[masterofpuppets]

#1: only propositions hold a logic value (true or false). Interrogations e.g. are not propositions.
#2: a proposition both true AND false is always false (no contradiction)
#3: a proposition that is true OR false is always true. ( the excluded middle)

After that you only need to make the construct.

You should try to discipline your thoughts by these 3 axioms. These are the laws of thought. The basis of logic.

Slightly different are the three logical absolutes proposed by Aristotle (in order: law of identity, law of non-contradiction, law of excluded middle):

1. X is X.
2. X cannot be both true and false.
3. X can only be true or false.

Your logical absolutes are correct, but I like these better based on their simplicity.

Without any of these axioms, logic is completely useless.