Obs. [ad. L. fallācitāt-em, n. of state f. fallax: see FALLACE a.] Fallaciousness.
1664. Power, Experimental Philosophy, III. 190. The old and uncomfortable Aphorism of our Hippocrates, of Natures obscurity, the Lifes brevity, the Senses fallacity, and the Judgements infirmity.
1773. Observ. State Poor, 49 However consistent this specious reasoning may be with justice, its fallacity will not escape detection.