Other forms: logics
Logic is careful step-by-step reasoning from facts to conclusions. Sound logic, the logic of the argument, there is no logic in it.
As a field, logic is the formal study of valid inference and is taught in philosophy, mathematics and computing. In everyday speech it means simply sensible reasoning — I can see the logic — and the logic of a situation means the way it is bound to work out. In computing, logic means the reasoning built into a circuit or a program. Note logical, which does duty as both the technical and the everyday adjective, and illogical, which is its everyday opposite.
1nounlogicCareful reasoning from premises to conclusions.
“Follow the logic and you get somewhere unpleasant.”
2nounstudyThe formal study of valid reasoning.
“She read logic and philosophy.”
3nounsituationThe way a situation is bound to develop.
“The logic of the position is that somebody has to resign.”
logic is a system of reasoning.
Greek logike came from logos, meaning word, reason and account all at once — the same root as -ology on the end of every science. Logic is the study of reasoning named after the word for reasoning and for speech, which are one thing in Greek.
Ancient Greek
λογῐκός
Latin
logicus
Middle English
logike
English, today
logic
From Middle English logike, from Old French - and Latin logicus, from Ancient Greek λογῐκός. Displaced native Old English flitcræftlīċ.
Etymology from Wiktionary, CC BY-SA