Fact: Something that has a concrete, provable existence; an actual occurrence; an objective reality.
Alternative fact: A disguised falsehood presented as true. See Orwell, George, doublethink: the simultaneous acceptance of two mutually contradictory “facts” without a sense of conflict or cognitive dissonance.
Truth: A quality or state in accordance with reality; the actual or true state or nature of a person, place, thing, or event. Fidelity. Honesty.
Lie: A false or misleading impression. A deception you tell yourself so you can sleep at night.