Wednesday
April 23, 2014

Homework Help: PHI103

Posted by Ashley on Sunday, March 18, 2012 at 9:13pm.

I really need some help on these questions Please! I am having a very tough time. I have tried to answer to the best of my ability, but i am not understanding these. Can someone please help with this? Thank you.

Truth tables can be used to examine inductive arguments.
deductive arguments.
abductive arguments.
All of the above
my answer d

2. Truth tables can
display all the possible truth values involved with a set of sentences.
determine what scientific claims are true.
determine if inductive arguments are strong.
determine if inductive arguments are weak.
my answer a

3. What is the truth value of the sentence "P & ~ P"?
True
False
Cannot be determined
Not a sentence
my answer c

4. In the truth table for an invalid argument,
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.

my answer b

5. If P is false, and Q is false, the truth-value of "P Q" is
false.
true.
Cannot be determined.
All of the above.
my answer a


6. The sentence "P Q" is best read as


If P then Q
If Q then P
P or Q
P if and only if Q

my answer d

7. "~ P v Q" is best read as Not P and Q
It is not the case that P and it is not the case that Q
It is not the case that P or Q
It is not the case that P and Q
my answer c

8. A sentence is said to be truth-functional if and only if
the sentence might be true.
the truth-value of the sentence cannot be determined from the truth values of its components.
the truth-value of the sentence is determined always to be false.
the truth-value of the sentence can be determined from the truth values of its components.

my answer d

9. The sentence "P Q" is read as
P or Q
P and Q
If P then Q
Q if and only P
my answer c

10. In the conditional "P Q," "P" is a
sufficient condition for Q.
sufficient condition for P.
necessary condition for P.
necessary condition for Q.

my answer b

Please let me know if these are correct.

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