whether one can; whether it is possible

is it possible or not?

whether or not (at the end of a phrase)

to negate; to deny; not

clogged; evil

can or cannot; is it possible?

decline to comment; not express an opinion; be noncommittal; hedge

to refuse to comment; same as 不置可否

(idiom) to evaluate the merits and demerits of; (esp. in formal, ethical or societal contexts) to critique; to judge