Another person refutes the claim, and the first person asks them to prove that the claim is not true. Burden of proof is one type of fallacy in which someone makes a claim, but puts the burden of proof onto the other side. The fallacy of the Burden of Proof occurs when someone who is making a claim, puts the burden of proof on another party to disprove what they are claiming. The source of the fallacy is the assumption that something is true unless proven otherwise. Typically this fallacious tactic is used when a person is ill-equipped to defend his position, or simply holds to a position that is indefensible. A fallacy is when someone makes an argument based on unsound reasoning. Shifting the burden of proof, a special case of argumentum ad ignorantium, is the fallacy of putting the burden of proof on the person who denies or questions the assertion being made. The …

You said that the burden of proof lies not with the person making the claim, but with someone else to disprove. For example, a person makes a claim. This fallacy originates from the Latin phrase "onus probandi incumbit ei qui dicit, non ei qui negat"). The burden of proof is on the person who makes the claim, not on the person who denies (or questions) the claim. The informal logical fallacy of shifting the burden of proof occurs when a person attempts to evade the task of demonstration by diverting that requirement to another person in conversation.

Burden of Proof.