The burden of proof

Use it when someone makes a wild claim without evidence. You can say, "The burden of proof lies with you." It sounds smart and stops people from making up facts. You can also use it in a lighter way. If your partner says you always forget the dishes, ask for proof! It works as a noun phrase in most sentences. Usually, it "lies with" or "falls on" someone.

Use it during serious debates or work meetings. It is perfect when discussing new projects or budgets. If a colleague says a new strategy will fail, they have the burden of proof. Use it in legal contexts or academic writing too. It shows you understand how logic works. It's great for shutting down internet trolls who make baseless claims.

Don't use it for simple opinions or feelings. If a friend says, "I feel sad," don't demand the burden of proof. That makes you a bad friend! Avoid it in very casual, high-energy parties. It can sound a bit too "lawyer-like" if used while dancing. Don't use it when the facts are already obvious to everyone. It makes you look like you are stalling.

This phrase comes from the Latin term onus probandi. It is a pillar of Western legal systems. In court, you are innocent until proven guilty. This means the government carries the burden of proof. Over time, it moved from the courtroom to the dinner table. It reflects a culture that values evidence and logical consistency. It’s a very "Western" way of arguing.

Sometimes people just say the onus. You might hear, "The onus is on them." In science, people talk about extraordinary claims. These require extraordinary evidence. In casual talk, you might hear "Put up or shut up." That is the much ruder version of this phrase! Stick to the original for more respect.