Deductive Logic


Introduction

The power of deductive logic comes from the fact that, if you apply valid logic to true premises, you will arrive at a true conclusion. We will discuss the power and importance of deductive reasoning further in pages that we add in the future.

Deductive Logic

Excerpted from Wikipedia

Deductive reasoning, also called deductive logic, is reasoning which constructs or evaluates deductive arguments. Deductive reasoning contrasts with inductive reasoning in that a specific conclusion is arrived at from a general principle. Deductive arguments are attempts to show that a conclusion necessarily follows from a set of premises or hypotheses. A deductive argument is valid if the conclusion does follow necessarily from the premises, i.e., the conclusion must be true provided that the premises are true. A deductive argument is sound if it is valid and its premises are true. Deductive arguments are valid or invalid, sound or unsound. Deductive reasoning is a method of gaining knowledge.

For the full entry at Wikipedia see here.