See also logic.alethiology the branch of logic dealing with truth and error. —alethiologist, n. —alethiological, adj. errancy 1. the condition of being in error. 2. the tendency to be in error or the capacity for being in error; fallibility. falsism anything that is patently false or untrue; a fallacy. Plinyism an assertion of doubtful truth or accuracy, as with some statements in Pliny’s Natural History. theopneusty the force or process of divine inspiration; the power by which the Holy Spirit reveals truth to men. —theopneustic, theopneusted, adj. truism a self-evident, obvious truth. —truistic, truistical, adj.