Core logic
Valid vs Sound Arguments: The Difference That Matters
Validity is about structure. Soundness is structure plus truth. Confusing the two is one of the most common mistakes in everyday debate.
Guides
Learn clear thinking
Deep, practical explainers you can cite — each one ends in a free drill. Pair with the reading path or glossary.
Fair debate
Steel-Manning: The Opposite of a Straw Man
Steel-manning means restating someone else's position in its strongest fair form before you criticize it. It is the single highest-leverage habit in honest disagreement.
Clear thinking
Hidden Assumptions and Enthymemes
Most everyday arguments skip a step. Hidden-assumption spotting means writing that missing premise so you can accept, reject, or revise it on purpose.