PHL 102
Mock Final Exam
John Halpin


I don’t do much multiple choice below. Redo Quizzes for more.


Now, print this page out and do problems. You will find Flash Movie's explaining answers in the text below.


1.   From 1.3e. Worth doing on paper though:




2.   For this one, rewrite on the paper below.



flashAnswers for 1 and 2



3.   Define “Cogent”.

a.    Sound with true premises

b.    Strong with true premises

c.    Inductive with true premises

d.   Deductive with true premises

4.   “All fish are mammals” is logically equivalent to

a.    No mammals are fish.

b.    All non-fish are mammals.

c.    All mammals are fish.

d.   No fish are non-mammals.

5.   ‘A>B’ is false when

a.    A is true and B is true

b.    A is true and B is false

c.    A is false and B is true

d.   A is false and B is false

6.   The following is a premise indicator

a.    If

b.    Then

c.    Since

d.   So

 flashAnswers for 4-6





flashAnswers for 7




8.   From 4.5 b


flashAnswers for 8




9.   Inductive arguments are typically

a.    Informal

b.    Ampliative

c.    An inference to the best overall interpretation of the data

d.   All of the above

10.   Consider: “Obama says that we need to invest in our student population to help grow the economy. But he’s wrong. What we need to consider the moral well-being of America. We’re clearly on the wrong track.” This argument commits the fallacy:

a.    appeal to pity

b.    straw man

c.    weak analogy

d.   red herring

e.    false cause

flashAnswers for 9-11



11.   Here are some problems from 3.3a…all fallacies of relevance.




12. 3.4a:


flashAnswers for 11-12


flashAnswers for 9-11

13.      Here are some fallacies of presumption from 3.5a:

flashAnswers for 13




14.  Derivations on the real final will start easier than these. But let’s jump into some that are a bit more challenging. (From 5.6d)

flashAnswers for 14





15.  From 6.1d:

flashAnswers for 15





16.  Now do similar problems, 6.5d, but allowing a broader UD and changing subjects.

flashAnswers for 16




17.  What rule may not be used on a line 2 if a premise on line 1 is

a.    TR

b.    IM

c.    &E

d.   CM

e.   none of the above is unusable



flashAnswers for 17




18.  Venn diagrams…we’ll do 6.4c #1. Though notice that the middle term’s circle is below rather than above the other two. Do the work and decide if the argument is valid.

flashAnswers for 18




19.      Some easier derivations in PL: 7.1c.

flashAnswers for 19




20.      Some derivations from 7.3h…these should make you think about categorical logic.
a) Think “All whales are mammals, and Ursula is not a mammal, so Ursula is not a whale.”

b) Here think “No whales are fish but Shamu is a whale thus he’s no fish.”

c) Here think about whales, fish, and mammals again…

d) A categorical syllogism: “All whales are mammals, no mammals are fisth, so no whales are fish.” (Note that I’ve expressed “no” in our two different ways.)

e) No F are W, Some M are W, so some M are not F:


flashAnswers for 20: a)-d)

flashAnswer for (the too long) 20 e)