Logic
late Middle English: via Old French logique and late Latin logica from Greek logikē (tekhnē) ‘(art) of reason’, from logos ‘word, reason’.
wiktionary
From Middle English logike, from Old French and Latin logicus, from Ancient Greek λογῐκός(logikós).
From Middle English logik, from Old French logike, from Latin logica, from Ancient Greek λογική(logikḗ, “logic”), from feminine of λογικός(logikós, “of or pertaining to speech or reason or reasoning, rational, reasonable”), from λόγος(lógos, “speech, reason”). Displaced native Old English flītcræft.
etymonline
logic (n.)
mid-14c., logike, "branch of philosophy that treats of forms of thinking; the science of distinction of true from false reasoning," from Old French logique (13c.), from Latin (ars) logica "logic," from Greek (he) logike (techne) "(the) reasoning (art)," from fem. of logikos "pertaining to speaking or reasoning" (also "of or pertaining to speech"), from logos "reason, idea, word" (see Logos). Formerly also logick. Sometimes formerly plural, as in ethics, but this is not usual. Meaning "logical argumentation" is from c. 1600. Contemptuous logic-chopper "sophist, person who uses subtle distinctions in argument" is from 1846.
