Wednesday

September 2, 2015
Posted by **Ahford university** on Monday, September 9, 2013 at 3:17pm.

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

CORRECT 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.

Instructor Explanation: The answer can be found in Chapter Six of An Introduction to Logic.

2. Question : The truth table for a valid deductive argument will show

Student Answer: CORRECT wherever the premises are true, the conclusion is true.

that the premises are false.

INCORRECT that some premises are true, some premises false.

wherever the premises are true, the conclusion is false.

Instructor Explanation: The answer can be found in Chapter Six of An Introduction to Logic.

3. Question : Truth tables can be used to examine

Student Answer: INCORRECT inductive arguments.

CORRECT deductive arguments.

abductive arguments.

All of the above

Instructor Explanation: The answer can be found in Chapter Six of An Introduction to Logic.

4. Question : A conditional sentence with a false antecedent is always

Student Answer: CORRECT true.

false.

Cannot be determined.

not a sentence.

Instructor Explanation: The answer can be found in Chapter Six of An Introduction to Logic.

5. Question : Truth tables can determine which of the following?

Student Answer: CORRECT If an argument is valid

If an argument is sound

If a sentence is valid

All of the above

6. Question : "P v Q" is best interpreted as

Student Answer: P or Q but not both P and Q

CORRECT P or Q or both P and Q

Not both P or Q

P if and only if Q

7. Question : What is the truth value of the sentence "P v ~ P"?

Student Answer: CORRECT True

INCORRECT False

Cannot be determined

Not a sentence

8. Question : One of the disadvantages of using truth tables is

Student Answer: INCORRECT it is difficult to keep the lines straight

T's are easy to confuse with F's.

CORRECT they grow exponentially and become too large for complex arguments.

they cannot distinguish strong inductive arguments from weak inductive arguments.

9. Question : "Julie and Kurt got married and had a baby" is best symbolized as

Student Answer: M v B

CORRECT M & B

M ¡æ B

M ¡ê B

10. Question : If P is false, and Q is false, the truth-value of "P ¡êQ" is

Student Answer: false.

CORRECT true.

Cannot be determined.

All of the above.

- PHI103: Informal Logic -
**Writeacher**, Monday, September 9, 2013 at 3:21pmWhat is this? An exam??