A) If French wine is more expensive than domestic wine, then it must be imported.
B) If French wine is not more expensive than domestic wine, then it must be imported.
C) If French wine must be imported, then it is more expensive than domestic wine.
D) If French wine must be imported, then it is not more expensive than domestic wine.
E) If French wine need not be imported, then it is more expensive than domestic wine.
Correct Answer
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Multiple Choice
A) The camp has a lake.
B) The camp is concerned about the safety of swimmers around boats.
C) The camp does not offer boating.
D) The camp's lake is too small for boating.
E) The camp offers boating.
Correct Answer
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Multiple Choice
A) categorical
B) pure hypothetical
C) mixed hypothetical
D) disjunctive
E) This information tells us nothing about the form.
Correct Answer
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Multiple Choice
A) the truth of the antecedent is sufficient to guarantee the truth of the consequent
B) the truth of the consequent is sufficient to guarantee the truth of the antecedent
C) the antecedent could be true, while the consequent is false
D) the truth of the antecedent tells us nothing about the truth of the consequent
E) the antecedent and consequent cannot both be false
Correct Answer
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Multiple Choice
A) All people with self-esteem are happy people.
B) All happy people are people with self-esteem.
C) Some people with self-esteem are happy people.
D) Some happy people are people with self-esteem.
E) No person with self-esteem is a happy person.
Correct Answer
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Multiple Choice
A) Yes.
B) No, because the disjunctive premise is not in standard form.
C) No, because the second premise does not deny any of the disjuncts.
D) No, because even if the premises are true, the conclusion could be false.
E) It depends on your view of existential import.
Correct Answer
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Multiple Choice
A) If we don't move the meeting to Thursday, then everyone agreed to it.
B) If we move the meeting to Thursday, then everyone agreed to it.
C) If someone disagrees, then we won't move the meeting to Thursday.
D) If everyone agrees, then we'll move the meeting to Thursday.
E) If everyone agrees, then we won't move the meeting to Thursday.
Correct Answer
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Multiple Choice
A) pure hypothetical
B) modus ponens
C) modus tollens
D) invalid-commits the fallacy of denying the antecedent
E) invalid-commits the fallacy of affirming the consequent
Correct Answer
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Multiple Choice
A) hypothetical
B) disjunctive
C) categorical
D) Propositions that contain those words cannot be formalized because they lack a true subject term.
E) Propositions that contain those words cannot be formalized because their content is too vague.
Correct Answer
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Multiple Choice
A) No S is P.
B) Some P are S.
C) Some S are P.
D) All S are P.
E) All P are S.
Correct Answer
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Multiple Choice
A) Yes, since replacing a proposition with another that is logically equivalent never has any effect on the structure of the argument.
B) Yes, since if one disjunctive proposition has such an equivalent, they all must.
C) No, since replacing one proposition with another will always have a significant effect on the structure of an argument.
D) No, since some disjunctive propositions contain more than two disjuncts.
E) No, since no disjunctive proposition ever has an equivalent hypothetical proposition.
Correct Answer
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Multiple Choice
A) Yes, because how the propositions are arranged is completely unimportant.
B) Yes, but only if one logician is better at logic than the other.
C) Yes, because there could be more than one good way to proceed through the argument.
D) No, because there is only one correct way to arrange the propositions in any particular argument.
E) No, because those forms would necessarily have different conclusions, and therefore not be forms of the same argument.
Correct Answer
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Multiple Choice
A) Something will be eaten.
B) Something will be cooked.
C) No one will cook supper.
D) Someone will not eat.
E) Someone will cook supper.
Correct Answer
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Multiple Choice
A) If something unexpected happens, then you will live to be 82 years old.
B) If something unexpected happens, then you will not live to be 82 years old.
C) If nothing unexpected happens, then you will live to be 82 years old.
D) If you do not live to be 82 years old, then nothing unexpected happened.
E) If you live to be 82 years old, then nothing unexpected happened.
Correct Answer
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Multiple Choice
A) All lids are things that have pots.
B) No lid is a thing that doesn't have a pot.
C) If something is a lid, then that thing has a pot.
D) All pots are things with lids.
E) A thing is not a lid or it has a pot.
Correct Answer
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Multiple Choice
A) one
B) two
C) three
D) four
E) five
Correct Answer
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Multiple Choice
A) Our knowledge of dinosaurs will always be incomplete.
B) We can only study dinosaurs from their fossils.
C) Dinosaurs are extinct.
D) If our knowledge of dinosaurs will always be incomplete, then they are extinct.
E) If the dinosaurs are extinct, then our knowledge of them will always be incomplete.
Correct Answer
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Multiple Choice
A) pure hypothetical
B) modus ponens
C) modus tollens
D) invalid-commits the fallacy of denying the antecedent
E) invalid-commits the fallacy of affirming the consequent
Correct Answer
verified
Multiple Choice
A) Homer Simpson has shortcomings.
B) Homer Simpson loves his family.
C) Homer Simpson is a heroic figure.
D) If Homer Simpson loves his family, then he will sacrifice for them.
E) If Homer Simpson will sacrifice for his family, then he is a heroic figure.
Correct Answer
verified
Multiple Choice
A) Yes, because I and O propositions do not have contraries.
B) Yes, because some propositions are already negative and cannot be negated again.
C) Yes, because some propositions are inherently affirmative and therefore cannot be negated.
D) No, because every proposition has a contrary.
E) No, because every proposition can be contradicted.
Correct Answer
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