Tuesday

October 21, 2014

October 21, 2014

Posted by **Help me** on Sunday, July 29, 2012 at 8:45pm.

P or Q but not both P and Q

P or Q or both P and Q

Not both P or Q

P if and only if Q

2. What is the truth value of the sentence "P & ~ P"? (Points : 1)

True

False

Cannot be determined

Not a sentence

3. If P is false, and Q is false, the truth-value of "P ¡êQ" is (Points : 1)

false.

true.

Cannot be determined.

All of the above.

4. The sentence "P ¡ê Q" is best read as

(Points : 1)

If P then Q

If Q then P

P or Q

P if and only if Q

5. The truth table for a valid deductive argument will show (Points : 1)

wherever the premises are true, the conclusion is true.

that the premises are false.

that some premises are true, some premises false.

wherever the premises are true, the conclusion is false.

6. A conditional sentence with a false antecedent is always (Points : 1)

true.

false.

Cannot be determined.

not a sentence.

7. Truth tables can be used to examine (Points : 1)

inductive arguments.

deductive arguments.

abductive arguments.

All of the above

8. In the conditional "P ¡æ Q," "Q is a (Points : 1)

sufficient condition for Q.

sufficient condition for P.

necessary condition for P.

necessary condition for Q.

9. In the truth table for an invalid argument, (Points : 1)

on at least one row, where the premises are all true, the conclusion is true.

on at least one row, where the premises are all true, the conclusion is false.

on all the rows where the premises are all true, the conclusion is true.

on most of the rows, where the premises are all true, the conclusion is true.

10. What is the truth value of the sentence "P v ~ P"? (Points : 1)

True

False

Cannot be determined

Not a sentence

- PHI103 -
**Anonymous**, Monday, October 28, 2013 at 3:05pm"P v Q" is best interpreted as (Points : 1)

P or Q but not both P and Q

P or Q or both P and Q

Not both P or Q

P if and only if Q

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