Excerpt from The Essentials of Logic
A Definition of Logic. Logic may be defined as the science of the principles and conditions of correct thinking. To the beginner, a definition serves mainly as a guide-post to direct Ms attention to the general character of the subject which he is about to study. The above definition should therefore be taken merely as an indication of the field. The terms of which it is composed will gather content and meaning as the various topics are covered. Toward the end of the course, it is to be hoped that the student will be able to come back to the definition with a fuller grasp of its significance.
Logic is a science in the sense that it is organized knowledge involving principles. The various sciences have different fields for investigation, but all of them agree in their purpose, which is the establishment of satisfactory information bound together and illuminated by laws. Thus, physics studies the most general characteristics of the physical world and seeks to reduce to order and interpret the facts it discovers; botany examines the structures, functions, and histories of plants; and psychology gives its attention to the behavior of creatures possessing consciousness. All these sciences seek to replace the loose and hazy notions of popular thought by exact and systematic knowledge.
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