the fact of an argument or a theory using an idea or a statement to prove something which is then used to prove the idea or statement at the beginning循环论证的（以一种观点证明另一观点，接着再用后一种观点反过来去证明前一观点）
There is a dangerous circularity about this argument.这个论点存在着危险的循环论证。🔊🔊