n.the logical fallacy of assuming the conclusion in the premises; begging the question
同义词：petitio
英汉双解大词典
petitio principii/pɪˈtɪʃɪˌəʊ prɪnˈkɪpɪˌaɪ/
1.
N（名词）
a form of fallacious reasoning in which the conclusion has been assumed in the premises; begging the question 预期理由(以未经证明的论点为依据的一种谬误推理); 窃取论点 (Sometimes shortened to petitio) [logic]