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27 Aug 2024, 23:54
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KarishmaB
Can you please help me with this. To find a valid assumption, we can negate the choice and the negated version should break the argument.
If we negate C -> "There is some geographical area which supports more than three similar species at the same time", but we don't know whether they support 11 or more species at the same time. It might be the case that they support more than 3 but less than 11 and this negated version doesn't break the argument.
Based on this, my understanding was option C should not be correct.
Can you please help me with this. To find a valid assumption, we can negate the choice and the negated version should break the argument.
If we negate C -> "There is some geographical area which supports more than three similar species at the same time", but we don't know whether they support 11 or more species at the same time. It might be the case that they support more than 3 but less than 11 and this negated version doesn't break the argument.
Based on this, my understanding was option C should not be correct.
06 Mar 2025, 23:46
Kudos
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Hi GMATNinja MartyMurray KarishmaB
I am a bit confused with the language of the argument "since the specimens used to distinguish eleven of the species come from animals that lived in the same area at the same time"
Do we mean "specimens" come from animals that lived in the same area at the same time OR "eleven species" come from animals that lived in the same area at the same time??
Can you please clarify this?
I am a bit confused with the language of the argument "since the specimens used to distinguish eleven of the species come from animals that lived in the same area at the same time"
Do we mean "specimens" come from animals that lived in the same area at the same time OR "eleven species" come from animals that lived in the same area at the same time??
Can you please clarify this?
07 Mar 2025, 00:02
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vic231
We are not looking for a necessary assumption here and hence our negation test is not applicable here.
We are looking for a sufficient assumption i.e. something that helps us draw the conclusion properly i.e. helps us establish the conclusion beyond doubt.
Premises:
Paleontologists have used small differences between fossil specimens to classify triceratops into sixteen species.
The specimens used to distinguish eleven of the species come from animals that lived in the same area at the same time.
No geographical area ever supports more than three similar species at the same time.
Now we can properly draw the conclusion that the classification is unjustified.
With sufficient assumptions, try to plug the assumption with the premises and see whether you conclusion can be logically derived.
