The Objectivist epistemology says that reason is the method of man's consciousness. Reason is the process of forming and using concepts. A human consciousness forms a concept by observing a number of similar concretes and mentally integrating them into one idea. The measurements of the concrete objects are omitted, and the concept subsumes the qualities that the concretes have in common. Reason also includes logic.
Logic is the art of noncontradictory identification.
Logic involves using concepts to draw conclusions. Objectivism accepts Aristotle's theory of logic. Objectivism says that the arbitrary is neither true or false. In philosophy, an arbitrary assertion is worse than false and is not worthy of consideration. Similarly, Objectivism says that nothing can be accepted on faith, because a statement cannot be accepted without any evidence.