What's th definition of logic?
(btw: who likes logic the rapper? #rattpack)

Log·ic1[ˈläjik]NOUNreasoning conducted or assessed according to strict principles of validity: "experience is a better guide to this than deductive logic" · [more]"he explains his move with simple logic" · "the logic of the argument is faulty"synonyms: reasoning · line of reasoning · rationale · argument · argumentationa particular system or codification of the principles of proof and inference: "Aristotelian logic"the systematic use of symbolic and mathematical techniques to determine the forms of valid deductive argument.the quality of being justifiable by reason: "there's no logic in telling her not to hit people when that's what you're doing"synonyms: reason · judgment · logical thought · rationality · wisdom · sense · [more]good sense · common sense · sanity · horse sense(logic of) the course of action or line of reasoning suggested or made necessary by: "if the logic of capital is allowed to determine events"a system or set of principles underlying the arrangements of elements in a computer or electronic device so as to perform a specified task.

Hey there...
According to Websters Merriam dictionary, logic is science that deals with the principles and criteria of validity of inference and demonstration simply put, logic is the science of the formal principles of reasoning.
Hope it helps :)