I am really confused about the use of "so as to".

Question

I am really confused about the use of "so as to". Can an expert help me here? Please read both examples to make a comparison.

Example 1

Although the Argentine ant is neither poisonous nor predatory,  individual colonies cooperate in a super-colony so large that its collective appetite can become a competitive  threat to bird, lizard, and other insect populations.
 
A)individual colonies cooperate in a super-colony so large that its collective appetite can become a competitive
B)individual colonies cooperate in a super-colony of such size, its collective appetite can become a competing
C)individual colonies cooperate in a super-colony so large as to cause its collective appetite to become a competitive
D)such is the size of the cooperative super-colony comprising individual colonies, its collective appetite can become a competing
E)there is so much size to the individual colonies’ cooperative super-colony that its collective appetite can become a competitive

Here A is the OA which is fine. Please keep C in mind as you read on.

Example 2

The category 1 to 5 rating known as the Saffir-Simpson Hurricane Scale provides an estimate of a hurricane’s potential  of destroying or damaging property, and is primarily determined from wind speed; a category 5 storm has wind speeds so high as  to blow away small buildings, completely destroy mobile homes, and cause severe window and door damage.
 
A)of destroying or damaging property, and is primarily determined from wind speed; a category 5 storm has wind speeds so high as
B)to destroy or damage property, and is primarily determined from wind speed; a category 5 storm has wind speeds high enough
C)of destroying or damaging property, and is primarily determined by wind speed; a category 5 storm has wind speeds so high as
D)to destroy or damage property, and is primarily determined by wind speed; a category 5 storm has wind speeds high enough
E)to destroy or damage property, and is primarily determined by wind speed; a category 5 storm has wind speeds so high as

Here OA is E.

Please compare both examples and let me know why  so as to  is correct in one and wrong in the other.

abhijit_sen · Answer

Example 1:
I think problem in C is not "So...As to", but it is "to become" rather than "can become". Use of "to become" removes the uncertainty.

Example 2
You have to choose between 2 idiom "X enough to Y in option D" or "So X as to Y in option E". While "X enough to Y" indicates that one has just enough quality of X to fulfill the criteria for Y, "So X as to Y" indicates that one has too much X so Y can be easily fulfilled.

FN · Answer

in the second sentence..

so high as to...is needed to emphasis that the winds are soo strong that will knock bldgs etc.

high enough suggests they are barely strong enough to knock bldgs etc..

its like

Jim is tall enough to reach the top ..here it means he is just tall enough to reach the top shelf

vs

Jim is so tall as to reach the top shelf...here the emphasis is that he is sooo tall that he can reach the top shelf..

hope my post makes sense??

Snowingreen · Answer

Nice explanation .

a note from Manhattan GMAT for the first question

Option (c) --> The construction “so x as to y,” presented here as “so large as to cause…” is a suspect idiomatic form, one that is not preferred by the GMAT.Moreover, the meaning is changed; "so large as to cause..." means that the outcome definitely happens. However, the original sentence only indicates that the "collective appetite CAN become..."

If given a choice between SO AS TO and SO X AS TO Y ( no other errors ) , which one should we prefer ?

blueseas · Answer

Although the Argentine ant is neither poisonous nor predatory,  individual colonies cooperate in a super-colony so large that its collective appetite can become a competitive  threat to bird, lizard, and other insect populations.

A)Individual colonies cooperate in a super-colony so large that its collective appetite can become a competitive

B)individual colonies cooperate in a super-colony of such size, its collective appetite can become a competing

C)individual colonies cooperate in a super-colony so large as to cause its collective appetite to become a competitive

D)such is the size of the cooperative super-colony comprising individual colonies, its collective appetite can become a competing

E)there is so much size to the individual colonies’ cooperative super-colony that its collective appetite can become a competitive

OE:

This sentence correctly uses the idiomatic construction “so x that y” where y is a subordinate clause that explains or describes x: “so large that its collective appetite…” The possessive pronoun “its” clearly refers to the “super-colony,” which is correctly modified by the adjective “large.”

(A) CORRECT. The original sentence is correct as written.

(B) The use of the noun “size” instead of the adjective “large” results in a more awkward and wordy alternative to the original sentence. The subordinate clause “its collective appetite…” should be introduced by “that.” Additionally, “competing” does not have the same meaning as “competitive.”

(C) The construction “so x as to y,” presented here as “so large as to cause…” is a suspect idiomatic form, one that is not preferred by the GMAT. Moreover, the meaning is changed; "so large as to cause..." means that the outcome definitely happens. However, the original sentence only indicates that the "collective appetite CAN become..."

(D) The construction “such is the size of the cooperative super-colony comprising individual colonies” is an awkward and wordy alternative to the original “individual colonies cooperate in a super-colony so large.” The subordinate clause “its collective appetite…” should be introduced by “that.” Additionally, “competing” does not have the same meaning as “competitive.”

(E) The construction “there is so much size to the individual colonies’ cooperative super-colony” is an awkward and wordy alternative to the original “individual colonies cooperate in a super-colony so large.”

VerbalBot · Answer

Automated notice from GMAT Club VerbalBot: 

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

 This post was generated automatically.

I am really confused about the use of "so as to".

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards