Logic and Critical Thinking
Quiz 3:
Square of Oppositions
Truth Test Table
1. Instruction: Select the answer that best characterizes each immediate inference.
Adopt the Boolean standpoint for these problems.
It is false that no Ilonggos are natives of Panay. Therefore, some Ilonggos are
natives of Panay.
a. Invalid
b. Valid
c. Invalid; existential Fallacy
2. INSTRUCTIONS: Select the answer that best characterizes each argument.
Adopt the Aristotelian standpoint.
Some hectic vacations are not pleasant experiences. Therefore, some
unpleasant experiences are not relaxed vacations.
a. Valid; no fallacy.
b. Invalid; illicit contrary.
c. Invalid; illicit subcontrary.
d. Invalid; existential fallacy.
e. Invalid; illicit contraposition.
3. INSTRUCTIONS: Select the answer that best characterizes each immediate
inference. Adopt the Aristotelian standpoint for these problems.
No credit card companies are supporters of consumer rights. Therefore, it is false
that all credit card companies are supporters of consumer rights.
a. Invalid, illicit contrary.
b. Invalid, illicit conversion.
c. Invalid, illicit subalternation.
d. Invalid, illicit subcontrary.
e. Valid.
4. INSTRUCTIONS: Select the answer that best characterizes each immediate
inference. Adopt the Aristotelian standpoint for these problems.
It is true that some toxic waste dumps are environmental hazards. Therefore, all
toxic waste dumps are environmental hazards.
a. Invalid, illicit subcontrary.
b. Invalid, existential fallacy.
c. Invalid, illicit contrary.
d. Invalid, illicit subalternation.
e. Valid.
5. INSTRUCTIONS: Select the answer that best characterizes each immediate
inference. Adopt the Aristotelian standpoint for these problems.
It is false that no bats are animals that carry rabies. Therefore, some bats are
animals that carry rabies.
a. Invalid, illicit subalternation.
b. Invalid, illicit contrary.
c. Invalid, existential fallacy.
d. Valid.
6. INSTRUCTIONS: Select the answer that best characterizes each immediate
inference. Adopt the Aristotelian standpoint for these problems.
It is false that no nurses are health care workers. Therefore, all nurses are health
care workers.
a. Invalid, existential fallacy.
b. Invalid, illicit subcontrary.
c. Invalid, illicit contrary.
d. Valid.
e. Invalid, illicit subalternation.
7. What proposition/s is/are logically undetermined based on number 6 given?
a. A and O
b. O
c. A, E, and O
d. A and E
8. What proposition/s is/are true in number 4?
a. O
b. E and I
c. E and O
d. E, O, and I
9. In the truth test table above, what is/are TRUE in number 1?
a. I
b. I AND A
c. E AND A
d. E, I, A
10. What proposition/s is/are TRUE based on number 7 given?
a. E and I
b. O
c. O and E
d. A, O, and I
11. What proposition/s is/are FALSE in number 3 based on the table above?
a. A, I, and O
b. A and I
c. I and O
d. None
12. In the truth test table above, what is/are false in number 1?
a. I and E
b. E
c. A, E, and I
d. A and E
13. What proposition/s is/are logically undetermined based on number 5 given?
a. E and I
b. A and I
c. A, E, and I
d. A and E
14. What proposition/s is/are FALSE in number 2 based on the truth test table
above?
a. A, E, and O
b. A and E
c. A
d. E and O
15. What is/are the truth value of O and A propositions in number 3?
a. Undetermined
b. False
c. O-True and A- False
d. True