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Sec11 - Chapter 1 Logic 1 What is logic Webster dictionary...

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1 Chapter 1 Logic 1. What is logic ? Webster dictionary definition : the science of correct reasoning; the science which describes relationships among propositions in terms of implication, contradiction, contrariety, and conversion. Logic is a science that deals with principles and criteria of validity of inference and demonstration. 2. What is reasoning? Webster dictionary definition : the drawing of inferences or conclusions from known or assumed facts. Reasoning is the mental process of looking for reasons to support beliefs, conclusions, actions or feelings. Two broad methods of reasoning deductive reasoning inductive reasoning 1.1 Deductive versus Inductive Reasoning 1.1.1 Problem solving Logic and reasoning are associated with the phrase problem solving and critical thinking. 1.1.2 Deductive Reasoning Deductive reasoning works from the more general to the more specific. Example 1 Q: What is the sum of the angles of the triangle on the right?
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