cogent

Etymology

From Latin cōgēns, present active participle of cōgō (“drive together, compel”), from cō + agō (“drive”).

adj

1. Reasonable and convincing; based on evidence.
   We congratulate our correspondents on some very cogent reasoning, and shall have to watch our step even more carefully in future! 1944 May and June, “In the Critics' Den”, in Railway Magazine, page 132
2. Appealing to the intellect or powers of reasoning.
3. Forcefully persuasive; relevant, pertinent.
   The prosecution presented a cogent argument, convincing the jury of the defendant's guilt.