非

Categorical negation: used to deny identity or category (defining what something "is not").

Verbal sense: to find fault with, criticize, denounce, or oppose.

Identificational negative: frequently appears in the construction 非...也 to establish that "A is not B."

Contrastive use: often serves as the first half of a "Not X, but Y" structure (frequently signaled by 而).

Prefixal use: can act as a prefix to create a category defined by exclusion (e.g., “the non-expert”).

vs. 不 and 未: while 不 is general negation and 未 is temporal/incomplete, 非 specifically denies identity or category.

vs. 否 (fǒu): 否 generally refers to denial or refusal; 非 focuses on categorical mismatch.

Philosophical nuance: in early Daoist or Legalist texts, the use of 非 often emphasizes a categorical error rather than a simple absence of a quality.

Tang-period reading: *biəi

Fanqie reading: 甫微

The "Verb/Negation Slide": The primary ambiguity is between "is not" and "criticizes." Check if the subject is in a position to judge before defaulting to a negative particle.

Double Negatives: While rare in early texts, be alert for double negatives used for emphatic affirmation in later vernacular styles.