Logic is a branch of philosophy. "God love you , so do I", love is the logic word

Hello Amr, It is a system of reasoning marked by consistent relations of parts adhering to an orderly system. Consistent Valid facts exhibiting correspondence among constituents of an entity. It uses deduction and generalization as methods of reasoning. Ignorance of any of those parts will result in an inability to comprehend a certain logic " being unable to follow a certain logic". Failing to use the reasoning method in a rational way will lead to a lack of orderly continuity, which will make a context devoid of logic, thus incomprehensible. Sounding logical doesn't require alone applying those methods rationally but also the listener's prior knowledge of the parts forming the statement. If the receiver ( whether reader or listener) doesn't know enough about the parts they might not perceive the logic. So still some logical statements might sound incomprehensible!

'logic' as to refer to a speech, could also mean 'rationale' which explains the fundamental reasons based on fact. e.g. the given premise: ALL Politicians. "IF ALL Politicians are rich, THEREFORE, President Obama is rich!" The fact: 'ALL Politicians are rich' :)

From the free online dictionary: Meaning of logic  Spelled Pronunciation [loj-ik] Logic is a noun 1. the science that investigates the principles governing correct or reliable inference. 2. a particular method of reasoning or argumentation: We were unable to follow his logic. 3. the system or principles of reasoning applicable to any branch of knowledge or study. 4. reason or sound judgment, as in utterances or actions: There wasn't much logic in her move. 5. convincing forcefulness; inexorable truth or persuasiveness: the irresistible logic of the facts. 6. Computers. logic circuit. Origin: 1325–75; ME logik < L logica, n. use of neut. pl. (in ML taken as fem. sing.) of Gk logikós of speech or reason. See logo-, -ic Synonyms: sense, cogency.

Logic is basically "using what I know in order to discover what I don't know". For example, pretend I don't know if John is younger than me. But I do know that John is younger than Tom. Logic works like this: What I know... 1. John is younger than Tom. 2. Tom is younger than me. What I didn't know (but discovered): 3. John is younger than me.