"The study of truth; that part of logic or philosophy which deals with the nature of truth", Mid 19th cent.; earliest use found in Henry Longueville Mansel (1820–1871), dean of St Paul's and theologian. From post-classical Latin alethiologia (1764, after German Alethiologie ( J. H. Lambert Neues Organon) from post-classical Latin alethia (late 2nd or early 3rd cent. in Tertullian) or its etymon ancient Greek ἀλήθεια truth (from ἀληθής true + -εία) + post-classical Latin -ologia.[alethiology etymology, alethiology origin, 英语词源]