This is true because logic depends, first of all, on the ability to move from a premise to a conclusion based on the premise. . . . Such a use of so-called true statements, without regard for the everyday realities, may seem frivolous and insignificant. In fact, such logic, which moves from premise to premise in a strict and logical sequence, is quite useful. . . Indeed, logic pertains to all subjects, since people can reason about anything they can think about. Politics, the arts, literature, business, the sciences, and everyday problems are all subjects open to reasoning.
People use logic to tell the difference. . . .
The twentieth century has witnessed remarkable advances in science and technology that have improved the lives of vast numbers of people. These applications of scientific method required a great deal of good and highly sophisticated reasoning. Logic is not the study of how people do reason, but how they should reason. Wilma is a cow. Therefore, Wilma is purple.