虚构的事
Figment \Fig"ment\, n. [L. figmentum, fr. fingere to form, shape, invent, feign. See {Feign}.] An invention; a fiction; something feigned or imagined. Social figments, feints, and formalism. --Mrs. Browning. It carried rather an appearance of figment and invention . . . than of truth and reality. --Woodward.
figment n : a contrived or fantastic idea; "a figment of the imagination"