When is use of 'for' objectionable? Why is it not here?

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I know the question has been answered earlier on this forum but I just couldn't find an answer to my question. Thanks in advance.

That educators have not anticipated the impact of microcomputer technology can hardly be said that it is their fault : Alvin Toffler, one of the most prominent students of the future, did not even mention microcomputers in Future Shock, published in 1970


(A) That educators have not anticipated the impact of microcomputer technology can hardly be said that it is their fault to lower the underground water level and to dig trenches
(B)That educators have not anticipated the impact of microcomputer technology can hardly be said to be at fault
(C)It can hardly be said that it is the fault of educators who have not anticipated the impact of microcomputer technology
(D)It can hardly be said that educators are at fault for not anticipating the impact of microcomputer technology
(E)The fact that educators are at fault for not anticipating the impact of microcomputer technology can hardly be said.

OG is D


I'm not able to understand why the use of "for" is correct here. Please help me understand this one.
Pls consider the following 2 sentences:
I picked up the pen to (/in order to) write a letter - CORRECT
A pen is for writing
I picked up the pen for writing a letter - INCORRECT
for - specifies the purpose of an object and "in order to" specifies purpose of an action.
So, here also, isn't the usage ".. for not anticipating .." incorrect? Please explain.
Thanks
~ Divine
Source: — Sentence Correction |

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by Jim@StratusPrep » Tue Sep 04, 2012 7:53 pm
It is a matter of purpose:

Did you pick up the pen so that you could write (in order to)

or

Did you pick up the pen that was used to write (for)

The first is the intended meaning...
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