User:VanishedUser 261249

Hm.... this opening paragraph should not contain the word "logic" inside its own definition.

Logic (from the λογική ), originally meaning "the word" or "what is spoken", but coming to mean "thought" or "reason", is generally held to consist of the systematic study of the form of valid inference. A valid inference is one where there is a specific relation of logical support between the assumptions of the inference and its conclusion. (In ordinary discourse, inferences may be signified by words like therefore, hence, ergo and so on.)