Why do you have to study Logic when you already have common sense?

Answer 1

Logic is more than common sense.

Logic is the study of the form of arguments. A valid argument is one where there is a specific relation of logical support between the assumptions of the argument and its conclusion.

In ancient times people were motivated to study logic so they could learn to distinguish good arguments from bad arguments, and so become more effective in argument and oratory, and perhaps also to become a better person.

Answer 2

Studying logic helps refine and systematize reasoning abilities beyond what is achieved through common sense. It provides a framework for evaluating arguments and making sound judgments, which can be especially valuable in complex or unfamiliar situations where common sense may not suffice.

Answer 3

To gain more knowledge and to devoleped our skill on how to use it.