You have explored the universe. You have learned to think clearly. Now comes the question beneath both: What must you assume before you can think at all? This introduction lays the groundwork for the entire book—introducing the three-layer taxonomy of axioms, presuppositions, and principles, and showing why understanding your own foundations matters more than ever in an age of competing worldviews and synthetic intelligence.

The first sharp tools: the Null Hypothesis ("not yet persuaded") and the Burden of Proof (the claim-maker carries the weight). Learn to spot burden-shifting moves and practice a stance that lets evidence guide you, rather than default belief.