Someone makes a bold claim. You push back. They say, "Prove me wrong" — and suddenly you're scrambling to disprove something you never even believed. That's a burden-of-proof trick, and once you can name it, you'll never fall for it again.

This TLDR primer breaks down one of the most practical concepts in all of philosophy: who has to prove what, and why. Starting from the core principle of *onus probandi* — Latin for "the burden of proving" — the book walks through how presumptions work in arguments, the rules for deciding which side carries the burden, and the most common fallacies people use to dodge it. You'll learn why "you can't disprove it" is not an argument, how extraordinary claims demand stronger evidence, and what it actually means to meet a burden of proof in different contexts, from a casual debate to a scientific claim to a policy dispute.

Written for high school and early college students — and ideal for anyone preparing for a debate class, a critical thinking course, or just trying to reason more clearly online — this guide is short by design and stripped to essentials. No filler, no academic detours, just the framework you need and the worked examples to make it stick.

If you want to argue better, spot manipulation faster, and think more clearly about burden of proof and logical presumption, this is your starting point. Grab your copy and get oriented.

• Define burden of proof and explain why every claim implicitly raises the question of who must defend it
• Distinguish presumption from assumption and identify the default position in common argument types
• Recognize and rebut burden-shifting fallacies such as the appeal to ignorance and 'prove me wrong' moves
• Apply burden-of-proof reasoning to debates, scientific claims, and informal disagreements
• Evaluate when a presumption is reasonable and when it should be challenged

1. 1. What Burden of Proof Actually Means
   Introduces burden of proof as the obligation to support a claim, separating the everyday phrase from the technical logical concept.
2. 2. Presumption: The Default Position in an Argument
   Explains presumption as the position that holds until challenged, contrasting it with assumption and showing how presumptions allocate the burden.
3. 3. Who Has the Burden? Rules for Allocating It
   Lays out practical rules for deciding which side carries the burden, including 'he who asserts must prove,' positive vs. negative claims, and extraordinary claims.
4. 4. Burden-Shifting Fallacies
   Identifies the most common ways arguers try to dodge their burden, with worked examples of how to spot and respond to each.
5. 5. Meeting the Burden: What Counts as Proof?
   Discusses standards of evidence and how strong a case must be in different contexts, from casual claims to scientific and policy debates.
6. 6. Putting It to Work: Debates, Science, and Everyday Disputes
   Applies the framework to real situations students encounter — class debates, online arguments, and evaluating news claims.