/ˈsɜːrkjəl pruːf/ – Phrase
Definition: chứng minh lòng vòng, lập luận vòng vo.
A more thorough explanation: A circular proof is a type of logical fallacy in which the conclusion of an argument is assumed in one of the premises. This creates a circular reasoning where the conclusion is used to support the premise, which in turn is used to support the conclusion. This type of reasoning is invalid and does not provide a sound basis for an argument.
Example: In the case, the plaintiff’s argument relied on a circular proof, as they attempted to prove their claim by referencing the same claim as evidence.