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16 May 2026, 16:35
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Some people believe there is intelligent life somewhere in the universe besides Earth. But no one who believes that could also believe all planets other than Earth are devoid of life. Thus, some people do not believe all planets other than Earth are devoid of life.
The reasoning in which one of the following is most similar to the reasoning in the argument above?
(A) Some people believe computers are capable of thought. Since no one who does not believe computer chess programs sometimes beat human chess masters believes computers can think, it follows that computer chess programs do sometimes beat human chess masters.
(B) Some cat owners believe cats are incapable of feeling guilty. Since one could think that an animal is capable of feeling guilty only if one thought the animal had a conception of morality, it follows that some cat owners do not believe cats have a conception of morality.
(C) Some dog owners believe their dogs are emotionally attached to them. Since no one could believe that and also believe dogs are incapable of thought, it follows that some dog owners do not believe dogs are incapable of thought.
(D) Some people believe humans will someday colonize other planets. Since anyone who believes that probably also believes overpopulation of Earth is not a problem, it follows that some people do not believe overpopulation of Earth is not a problem.
(E) Some people believe there is life on planets other than Earth. Since anyone who believes that must also believe other planets have atmospheres that can support life, it follows that other planets do have atmospheres that can support life.
The reasoning in which one of the following is most similar to the reasoning in the argument above?
(A) Some people believe computers are capable of thought. Since no one who does not believe computer chess programs sometimes beat human chess masters believes computers can think, it follows that computer chess programs do sometimes beat human chess masters.
(B) Some cat owners believe cats are incapable of feeling guilty. Since one could think that an animal is capable of feeling guilty only if one thought the animal had a conception of morality, it follows that some cat owners do not believe cats have a conception of morality.
(C) Some dog owners believe their dogs are emotionally attached to them. Since no one could believe that and also believe dogs are incapable of thought, it follows that some dog owners do not believe dogs are incapable of thought.
(D) Some people believe humans will someday colonize other planets. Since anyone who believes that probably also believes overpopulation of Earth is not a problem, it follows that some people do not believe overpopulation of Earth is not a problem.
(E) Some people believe there is life on planets other than Earth. Since anyone who believes that must also believe other planets have atmospheres that can support life, it follows that other planets do have atmospheres that can support life.
ankushsambare
Joined: 13 Jun 2022
Last visit: 18 May 2026
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16 May 2026, 22:23
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Premises
Structure: Some people believe A. A is incompatible with belief B. Therefore, some people do not believe B.
Check options
A: Different structure
B: Not same logic form
C: Some believe A; A incompatible with B; therefore some do not believe B matches
D: Uses probability (“probably”)
E: Wrong conclusion strength
Answer: C
- Some people believe: intelligent life exists elsewhere in the universe.
- No one who believes that can also believe: all other planets are devoid of life.
- Therefore, some people do not believe all other planets are devoid of life.
Structure: Some people believe A. A is incompatible with belief B. Therefore, some people do not believe B.
Check options
A: Different structure
B: Not same logic form
C: Some believe A; A incompatible with B; therefore some do not believe B matches
D: Uses probability (“probably”)
E: Wrong conclusion strength
Answer: C
17 May 2026, 04:30
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Some people believe there is intelligent life somewhere in the universe besides Earth. But no one who believes that could also believe all planets other than Earth are devoid of life. Thus, some people do not believe all planets other than Earth are devoid of life.
The reasoning in which one of the following is most similar to the reasoning in the argument above?
The original argument has this structure: some people believe X. Anyone who believes X cannot also believe Y. Therefore, some people do not believe Y. The argument is about incompatible beliefs, not about what is actually true in the world.
(A) Some people believe computers are capable of thought. Since no one who does not believe computer chess programs sometimes beat human chess masters believes computers can think, it follows that computer chess programs do sometimes beat human chess masters.
Wrong. This moves from people’s beliefs to a factual conclusion about computer chess programs. The original argument concludes only what some people do not believe.
(B) Some cat owners believe cats are incapable of feeling guilty. Since one could think that an animal is capable of feeling guilty only if one thought the animal had a conception of morality, it follows that some cat owners do not believe cats have a conception of morality.
Wrong. The structure is different. The premise is about people who believe cats are incapable of guilt, but the conditional is about people who believe an animal is capable of guilt.
(C) Some dog owners believe their dogs are emotionally attached to them. Since no one could believe that and also believe dogs are incapable of thought, it follows that some dog owners do not believe dogs are incapable of thought.
Correct. This matches exactly: some people believe X; no one who believes X can also believe Y; therefore, some people do not believe Y. Here, X is that dogs are emotionally attached, and Y is that dogs are incapable of thought.
(D) Some people believe humans will someday colonize other planets. Since anyone who believes that probably also believes overpopulation of Earth is not a problem, it follows that some people do not believe overpopulation of Earth is not a problem.
Wrong. “Probably” makes the logic weaker, and the relationship is not one of incompatible beliefs.
(E) Some people believe there is life on planets other than Earth. Since anyone who believes that must also believe other planets have atmospheres that can support life, it follows that other planets do have atmospheres that can support life.
Wrong. This again moves from belief to fact. The original argument does not conclude that life actually exists elsewhere; it concludes only that some people do not believe a certain claim.
Answer: (C)
The reasoning in which one of the following is most similar to the reasoning in the argument above?
The original argument has this structure: some people believe X. Anyone who believes X cannot also believe Y. Therefore, some people do not believe Y. The argument is about incompatible beliefs, not about what is actually true in the world.
(A) Some people believe computers are capable of thought. Since no one who does not believe computer chess programs sometimes beat human chess masters believes computers can think, it follows that computer chess programs do sometimes beat human chess masters.
Wrong. This moves from people’s beliefs to a factual conclusion about computer chess programs. The original argument concludes only what some people do not believe.
(B) Some cat owners believe cats are incapable of feeling guilty. Since one could think that an animal is capable of feeling guilty only if one thought the animal had a conception of morality, it follows that some cat owners do not believe cats have a conception of morality.
Wrong. The structure is different. The premise is about people who believe cats are incapable of guilt, but the conditional is about people who believe an animal is capable of guilt.
(C) Some dog owners believe their dogs are emotionally attached to them. Since no one could believe that and also believe dogs are incapable of thought, it follows that some dog owners do not believe dogs are incapable of thought.
Correct. This matches exactly: some people believe X; no one who believes X can also believe Y; therefore, some people do not believe Y. Here, X is that dogs are emotionally attached, and Y is that dogs are incapable of thought.
(D) Some people believe humans will someday colonize other planets. Since anyone who believes that probably also believes overpopulation of Earth is not a problem, it follows that some people do not believe overpopulation of Earth is not a problem.
Wrong. “Probably” makes the logic weaker, and the relationship is not one of incompatible beliefs.
(E) Some people believe there is life on planets other than Earth. Since anyone who believes that must also believe other planets have atmospheres that can support life, it follows that other planets do have atmospheres that can support life.
Wrong. This again moves from belief to fact. The original argument does not conclude that life actually exists elsewhere; it concludes only that some people do not believe a certain claim.
Answer: (C)
