“The truth or falsehood of all of man’s conclusions, inferences, thought and knowledge rests on the truth or falsehood of his definitions.” — Ayn Rand

Learn More:

• “Concepts”; “Definitions”; “Words”; in The Ayn Rand Lexicon

• Introduction to Objectivist Epistemology by Ayn Rand

• Concepts and Their Role in Knowledge: Reflections on Objectivist Epistemology by Allan Gotthelf (Editor) and James G. Lennox (Editor)

• How We Know: Epistemology on an Objectivist Foundation by Harry Binswanger

• “Logical Thinking” by Harry Binswanger