The Law of Non-contradiction:
Two opposing things cannot both be correct simultaneously.
One question cannot correctly elicit two opposing answers at the same time under the same circumstances.
Truth:
Truth, by definition, is not subjective. It does not change, or cease.
A false beginning (premise) cannot be used to justify a conclusion.
Relativism:
Invocation of moral law requires a moral law setter. “Every man for himself” invalidates any objection to any individual’s behaviour based on wrongness.