Introduction to Logic

2. Diversity of Logic

3. Why “Introduction To Logic”?

4. DEFINITION Science dealing with principles of valid reasoning and arguments

5. EXAMPLE “All mammals are four-footed animals; all people are mammals; therefore, all people are four-footed animals”

6. EXAMPLE “Some animals are two-footed; all people are animals; therefore, all people are two-footed”

7. VALIDITY Depends on form of argument, not content

8. HISTORY Aristotelian Logic • Syllogistic Reasoning

9. HISTORY

10. RECENT DEVELOPMENTS • Many-Valued logic • Fuzzy logic • Modal logic • Deontic logic

11. CONCLUSION A diverse field that begs further research

12. Questions & Answers

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