cogency
n. (理论、议论等的)说服力,中肯切题
A cogent reason, argument, or example is strong and convincing.
There were perfectly cogent reasons why Julian Cavendish should be told of the Major's impending return.
要将少校即将返回的消息告知朱利安·卡文迪什是有绝对充足的理由的。
1. persuasive relevance
2. the quality of being logically valid
The film makes its points with cogency and force.
影片强有力地阐明了主旨。