grammar → 不見得
TSUMUGU · TBCL 4 (est.) · 語法
不見得 grammar point · tier 1 · epistemic hedge 不見得 (not necessarily; not likely to be so)
Denies that a conclusion necessarily follows: the expected result is not guaranteed, though it may still hold.

Hook inherited from .

Denies that a conclusion necessarily follows
框 · Frame
不見得 + [the conclusion being held back]
觸 · Trigger
Someone treats an outcome as guaranteed, and you want to say it might not be.
序 · The move
1Name the conclusion someone expects to follow — the thing you are about to hold back.Is there a foregone conclusion in the air? 不見得 only works against an expectation; with none, it has nothing to push on.
2Put 不見得 in front of that conclusion, in the adverb slot before the verb phrase.It sits where 一定 would sit; 不見得 is the denial of that 一定, not a flat 不.
3Leave the conclusion possible — you deny that it must hold, not that it holds.Could the thing still turn out true? If your sentence shuts that door, you wanted 不是, not 不見得.
例 · Examples
1成績不好poor grades的學生the student (who)不見得not necessarily無法unable to獲得to obtain, win成功的機會a chance at success
A student whose grades are poor is not necessarily unable to win a chance at success.
界 · Boundary
不是
不是 denies the fact (it is not so); 不見得 denies the necessity (it is not necessarily so). 不見得 leaves the outcome possible; 不是 rules it out.
不一定
不一定 is the plain everyday 'not necessarily', flat in tone; 不見得 carries a lean against an expectation — the speaker is pushing back on something taken for granted. Same job, 不見得 is the more pointed register.
未必
未必 is the formal, written 'not necessarily'; 不見得 is its colloquial twin. Interchangeable in meaning, split by register.
他不見得是醫生,他是老師 (using it for a plain fact) → 他不是醫生,他是老師 (a settled negation takes 不是, not 不見得)
貴的不見得一定好 → 貴的不見得好 (不見得 already denies the 一定; don't double it)
不見得他會來 → 他不見得會來 (不見得 sits in the adverb slot before the verb, not at the head)
English 'not necessarily' can stand alone as a whole reply; Chinese 不見得 also answers bare, but inside a sentence it must sit in the adverb slot before the verb phrase, not float at the front like the English clause adverb.