308 sessions, 17 categories

🧩 Logic

These sessions are about the machinery underneath a good argument, the kind that survives even when the conclusion is unwelcome. A kid learns to spot the assumption hiding inside an ordinary sentence, to tell a real contradiction from two people who just disagree, and to sit with a barber who cannot possibly exist no matter which way the question is answered. The goal is not winning arguments. It is noticing when reasoning is actually doing work and when it just sounds like it is.

Nine sessions, from the wolf, the goat, and the cabbage to the paradox that convinced a brilliant mathematician his life's work had a crack in it. A kid who has lived through Zeno's paradox understands, in their bones, that infinitely many steps can add up to a finite distance. That's a different kind of knowing than being told the answer.

• LOGIC-1What Makes Thinking Bulletproof?start here~16 minWhat makes an argument impossible to escape? Logic is what necessarily follows from what you've already accepted as true.
• LOGIC-2The Jumpstart here~16 minWhat's the difference between a guess and an inference? An inference is a conclusion the evidence actually supports.
• LOGIC-3Where the Argument Landsstart here~15 minWhat is an argument actually trying to prove? Working backward from a conclusion to find what it secretly requires.
• LOGIC-4The Invisible Claimstart here~12 minWhat is everyone assuming without saying it out loud? Most arguments quietly rely on assumptions nobody's examined.
• LOGIC-5The Thing That Does Not Change When You Look Awaystart here~16 minWhat makes something true, really? Truth means matching reality, whether or not anyone believes it.
• LOGIC-6The Argument That Destroys Itselfstart here~15 minCan two claims both be true at once? A contradiction proves that at least one of them is false.
• LOGIC-7The Barber Shop Mystery~31 minCan you figure out who did it without seeing it happen? Inference from indirect evidence.
• LOGIC-8River Crossing Puzzle Masters~21 minHow do you plan around rules that keep getting in your way? Constraint puzzles and thinking several moves ahead.
• LOGIC-9The Wall You Can Never Touch~36 minCan you add up infinitely many numbers and still get a normal answer? The ancient 'motion is impossible' paradox and how it's resolved.
• LOGIC-10The Answer Already in the Picture~25 minWhy does a valid argument's conclusion feel inescapable? Drawn as circles, the answer is something you can actually see, not just reason through.
• LOGIC-11Enough, or Just Required?~24 minWhy can something be required without being enough? Necessary and sufficient conditions, and the everyday arguments that mix them up.
• LOGIC-12Running the Rule Backwards~22 minDoes wet grass always mean it rained? Not necessarily, and reversing an if-then rule is one of the most common reasoning mistakes there is.
• LOGIC-13Spot the Cheat~21 minCan you name the trick being used against you mid-argument? Five classic fallacies, tested live on a real bedtime negotiation.
• LOGIC-14The Dragon You Can Never Catch~23 minWhat's wrong with a claim that dodges every possible test? Nothing you can prove, and that's exactly the problem.