1. MAT 142 Lecture Video Series

2. Truth Tables

3. Objectives Construct a truth table for a given symbolic expression. Determine if two given statements are equivalent using truth tables. Use De Morgan’s Laws to write a statement equivalent to a given statement.

4. Vocabulary truth table equivalent expressions De Morgan’s Laws

5. Negation p~p T F F T

6. Conjunction pq T T TF FT FF T F F F

7. Disjunction pq T T TF FT FF T T T F

8. Conditional pq T T TF FT FF T F T T

9. Construct a truth table for: p~p~p T F T FT T

10. pq T T TF FT FF

11. Construct a truth table for the following statement: If the lyrics are not controversial, then the performance is not banned. p: q:q: The lyrics are controversial. The performance is banned

12. Construct a truth table for the following statement: The country singer is in trouble if he is elected. p: q:q: The country singer is elected. The country singer is in trouble. If he is elected, then the country singer is in trouble.

13. Construct a truth table for the following statement: If he does not go to jail, he is innocent or has an alibi. p: q:q: He goes to jail. He is innocent. r:r: He has an alibi.

14. Construct a truth tables for: and

15. Construct truth tables to determine whether the following statements are equivalent. 1.The streets are wet or it is not raining. 2.If it is raining, then the streets are wet.

16. DeMorgan’s Laws

17. General Negations

18. Creator and Producer Elizabeth Jones for The School of Mathematical and Statistical Sciences at Arizona State University Videographer Mike Jones ©2009 Elizabeth Jones and School of Mathematical and Statistical Sciences at Arizona State University