amyhussein wrote:Any medical test will sometimes fail to detect a condition when it is present and indicate that there is one when it is not.
b) when a condition is present and indicate that there is one
c) a condition when it is present and indicate that it is present
d) when a condition is present and indicate its presence
e) the presence of a condition when it is there and indicate its presence
what is teh correct answer and why the rest are wrong
In A, both
one and
it seem to refer to
a condition.
The result is a nonsensical meaning:
Any medical test will sometimes indicate that there is ONE CONDITION when A CONDITION is not.
Eliminate A.
B and D distort the meaning by implying that the purpose of a medical test is to detect a MOMENT IN TIME:
WHEN a condition is present.
The purpose of a medical test is to detect the CONDITION itself, not WHEN the condition is present.
Eliminate B and D.
In E, the first
it could refer to
the presence or to
a condition.
Since
C avoids this issue and is free of errors, eliminate E.
The correct answer is
C.
The OA:
Any medical test will sometimes fail to detect a condition when it is present and indicate that it is present when it is not [present].
Here, each instance of
it has the same, clear referent:
a condition.
Note the use of ELLIPSIS: the word in brackets is omitted, but its presence is clearly understood.
The ellipsis is made clear by the PARALLEL FORMS:
that IT IS PRESENT when IT IS NOT [PRESENT].
Only the OA offers these parallel forms at the end of the sentence.
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