The Basics of Logic

This chapter attempts to establish an understanding of the concept of logic. Since there is no unanimous definition of logic, we shall consider some definitions which will facilitate our development of a working definition. This will be followed by a historical trajectory of logic as a discipline, and thereafter, an exposition of the scope and subject matter of logic, as well as the laws of thought shall be given. The aspects or divisions of logic shall also be examined here-in. This chapter shall also include an overview of arguments in logic. This will be done by means of some definitions which will facilitate an understanding of the concept of argument. Since arguments are constituted by sentences which are called propositions, a distinction shall be made between sentences in the ordinary sense and in the propositional sense. This will be followed by a quick glance at the components of arguments. Inference, a term which denotes the relationship between the components of arguments, namely, premises and conclusions, shall also be considered. Also to be discussed in this chapter are: types and kinds of arguments, some instantiations of arguments, truth-value of propositions, validity and invalidity of arguments as well as sound and unsound arguments. A briefing on the usefulness of arguments to man shall also be given in this chapter. The end-point of this chapter shall be a discourse on the relevance or value of logic as it applies to our daily living.