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DarkHorse2019
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DarkHorse2019
A broken piece of war plane wing found in the middle of an ocean had two propellers attached to it. Mid-tier war planes have at most three propellers attached to each wing. Hence the discovery clearly indicates that the wing belonged to a mid-tier war plane.

Which of the following, if true, most strongly supports the hypothesis?

A) Propellers were used only on war plane wings.
B) No mid-tier war plane design that is known only two propellers per wing.
C) The location at which the piece of wing was found also contained the remnants of several other war planes.
D) Propellers are the most economical and efficient means to provide additional thrust to a war plane during its flight.
E) The plane wing would not have been long enough to accommodate at least another 2 propellers as a whole.

A seems to strengthen the conclusion that the wing belonged to a mid-tier warplane, because the wing had propellers. However, it does not. A strengthener fills in the logical gap between the premise and the conclusion. Even if A is true, A does not strengthen the conclusion together with the premise "Mid-tier planes have ... wing". If A is a strengthener, "two propellers" and "Mid-tier planes have ... wing" will be redundant. A does not fill in the logical gap.

E, however, fills in the logical gap. E depends on the premise to strengthen the conclusion.
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The word "would" in option E seems to be a little off beat ! Better formation of the same sentence was possible.
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Why not option B .
It could not have been 1 propellor since there are 2 attached. If there were only 2 propellors then it supports that it is mid-tier and if there 3 if could have still meant it was 3 tier but if there were 4 it is not mid-tier.
Is that the reasoning behind eliminating B?
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fitzpratik
A broken piece of war plane wing found in the middle of an ocean had two propellers attached to it. Mid-tier war planes have at most three propellers attached to each wing. Hence the discovery clearly indicates that the wing belonged to a mid-tier war plane.

Which of the following, if true, most strongly supports the hypothesis?

A) Propellers were used only on war plane wings. WRONG. The argument talks of war planes . Not about whether war planes are only planes with propellers
B) No mid-tier war plane design that is known only two propellers per wing. WRONG: Argument talks about "AT MOST THREE" Could be two, could be one
C) The location at which the piece of wing was found also contained the remnants of several other war planes. WRONG: Argument does not talk about the location at all!
D) Propellers are the most economical and efficient means to provide additional thrust to a war plane during its flight. ABSOLUTELY WRONG
E) The plane wing would not have been long enough to accommodate at least another 2 propellers as a whole. CORRECT: The wing is not long enough for 4 propellers, that means wing can only have at the most 3 propellers: Correct
­


I can't wrap my head around your reasoning
the question stem says  "Mid-tier war planes have at most three propellers attached to each wing." So that means there cannot be more than three.
then why are we thinking about accomodating another 2 propellers? Isn't this contradictory to the question stem?
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