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# Dl wright -section 3.7

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• The truth table on slide 12 for the fallacy of the inverse has an error in one of its truth values. The third row 4th column should be false, not the second row.

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### Dl wright -section 3.7

1. 1. Unit II LOGICSection 3.7: Argument and Truth Tables<br />
2. 2. What is an argument???<br />An argument consists of TWO parts!<br />Premises given statements<br />Conclusion decision reached<br />
3. 3. True or not…that is the QUESTION!<br />Valid Argument : If premises are true, the conclusion is true<br />Invalid Argument (fallacy): argument that isn’t true<br />
4. 4. Testing the Validity of a Statement<br />Use TRUTH TABLES!!!<br />An argument is valid if the statement is a tautology (basically the last column of the truth table is true)<br />
5. 5. Types of Valid Arguments<br />
6. 6. Types of Invalid Arguments<br />
7. 7. Example :<br />1. <br />
8. 8. SOLUTION Example :<br />1. Fallacy of inverse invalid <br />Solution using TRUTH TABLE:<br />
9. 9. SOLUTION Example :<br />1. Fallacy of inverse invalid <br />Solution using TRUTH TABLE:<br />
10. 10. SOLUTION Example :<br />1. Fallacy of inverse invalid <br />Solution using TRUTH TABLE:<br />
11. 11. SOLUTION Example :<br />1. Fallacy of inverse invalid <br />Solution using TRUTH TABLE:<br />
12. 12. SOLUTION Example :<br />1. Fallacy of inverse invalid <br />Solution using TRUTH TABLE:<br />Since the second row of the last column is FALSE, the statement is a fallacy, or INVALID <br />