training in the subject, logic can seem to be somewhat mysterious and perhaps esoteric. But in truth, logic is one of the most practical branches of philosophy. Logic is the study of good reasoning, and it is likely that you already grasp basics of logic just through your own common sense and innate reasoning abilities. As we think about good reasoning and good arguments, the most basic and fundamental principles of logic are often summed up in what are called the three laws of logic or sometimes