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IanStewart MartyMurray KarishmaB GMATNinja GMATGuruNY gmatophobia

Hello Experts! I have two questions. First, is this not a "Must be True/Inference" question? The tag shows Stregthen.

Second, I find Option C, shown as the OA, problematic. It says No substance will be found that is perceived to be sweeter than the substance the researchers have discovered. However, we may come upon another substance "X" which too may require just one molecule to activate any sweetness receptor.
Also, the molecule of this substance "X" may happen to be smaller than the size of the molecule the researchers have found. Then, according to the passage, this substance "X" would be the most sweetest of all.

Please clarify. Thanks in Advance!!
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Feb2024
IanStewart MartyMurray KarishmaB GMATNinja GMATGuruNY gmatophobia

Hello Experts! I have two questions. First, is this not a "Must be True/Inference" question? The tag shows Stregthen.

Second, I find Option C, shown as the OA, problematic. It says No substance will be found that is perceived to be sweeter than the substance the researchers have discovered. However, we may come upon another substance "X" which too may require just one molecule to activate any sweetness receptor.
Also, the molecule of this substance "X" may happen to be smaller than the size of the molecule the researchers have found. Then, according to the passage, this substance "X" would be the most sweetest of all.

Please clarify. Thanks in Advance!!

Hi Feb2024

There is no relationship given regarding the size of molecule and the perception of sweetness.

The only relationship the passage states is between the number of molecules that are required to active a receptor and the perception of sweetness. Hence, it would be incorrect to assume that the size also plays a role.

The passage gives us a sufficient condition.

In the example above, if just one molecule of Substance X is enough to activate a sweetness receptor, it would be perceived as equally sweet as the substance the researchers have discovered.
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(A) The more sweetness receptors a person has on his or her tongue, the more likely it is that that person will find sweet sensations pleasurable.
Not supported, we are not given any info on how pleasurable a person will find sweet sensations.

(B) In sufficient quantity, the molecules of any substance can activate a sweetness receptor.
Not supported, any is an over generalised here, we don't have enough info from the argument to support this.

(C) No substance will be found that is perceived to be sweeter than the substance the researchers have discovered.
Supported, we are given that "..fewer molecules that are required to activate a receptor, the sweeter that substance will be perceived to be", thus, a substance which requires 1 molecule will be the sweetest.

(D) A substance that does not activate a sweetness receptor will activate a taste receptor of another type.
Not supported, the given information is only limited to sweetness receptor, not about taste receptor of another type.

(E) The more molecules of a substance that are required to activate a single sweetness receptor, the more bitter that substance will be perceived to be.
Not supported, we can't say with certainty as there is no proportional relationship given in the argument, it is possible that there comes a stagnation stage where molecules required to activate sweetness receptors becomes constant despite increasing bitterness of the substance.
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