What Logic Actually Is

Logic is the skill of working out what follows from what — the quiet foundation under every line of code, every proof, and every argument you'll ever need to judge. This is where it starts.

1. Logic Is the Skill Under Everything Logic is the study of what follows from what — not facts, but the connections between them. It's the quiet foundation under code, math, and every argument, and it's learnable.
2. Statements, Truth, and Validity A statement can be true; an argument can be valid; only a sound argument is both. Confusing truth with validity is the single biggest reasoning mistake — here's how to never make it again.
3. The Three Ways We Reason Deduction guarantees, induction generalizes, abduction guesses the best explanation. Knowing which of the three you're using — and where each fails — is the core of reasoning well.