yaygmat wrote:
. ‗So as
to‘ cannot be used to replace ‗in order to‘ (SC Grail – pg. 114)
So as to is a legitimate idiom. Its meaning is fairly similar to that of
in order to.
The difference involves the chain of causation / order of steps.
• "in order to do X" should describe an action(s) that
DIRECTLY enable
THE SUBJECT to do 'X'.
• "So as to do X" is for actions that only
indirectly enable the subject to do 'X'. In this case, there should still be more intermediate steps that have to be completed, and/or other necessary actions that also have to be taken along with whatever is done 'so as to X'.
—BUT— ultimately,
THE SUBJECT still has to be planning to do 'x'.
It's true that "so as to..." hasn't historically appeared in correct answers from GMAC—but NOT because this construction is wrong or unidiomatic.
The issue is simply the fact that SC items are all
SINGLE sentences THAT MAKE SENSE BY THEMSELVES.
Indirect causality is not easy to write into a single sentence! That's why "so as to..." isn't historically common in correct answers.
The same principle, by the way, also explains why "allow
for PERSON/ENTITY to VERB" (= enabling this action INDIRECTLY, by setting up a necessary circumstance or fulfilling some sort of pre-requisite) doesn't much figure in correct answers—as opposed to "allow PERSON/ENTITY to VERB" (= giving DIRECT permission), which
does appear in quite a few correct answers.
The ACTUAL REASON why "so as to..." is wrong here is in
this color above.
The SUBJECT here is the proposed simplification of the tax code. The simplification, if it goes into effect, will eliminate a bunch of ways for tax-savvy people to reduce the amount of tax they pay.
This simplification will force those taxpayers to pay more taxes—thus MAKING IT POSSIBLE for some OTHER, LATER policy/legislation to lower tax rates for a different group of taxpayers. But, actually lowering the tax rates would require FURTHER lawmaking.
The proposed policy that's the subject of this sentence WILL NOT lower the tax rates. It'll just clear out room for some OTHER policy to eventually do that. Because the action of lowering tax rates will ••NOT•• done by
THE SUBJECT,
BOTH "in order to" AND "so as to" are incorrect here. For exactly the same reason!