The term 'Be Plausible' can be summarized by two crossword solutions: SOPHISM (7 letters) and CREDIBLY (8 letters). SOPHISM is a type of argument that appears to be logical but is actually false. It is often used to deceive or mislead people. CREDIBLY, on the other hand, means to be believable or trustworthy. It is often used to describe something that is accepted as true or reliable. Together, these two words suggest that one should be careful to make sure their arguments are sound and trustworthy in order to be seen as plausible.