Official answer is not problematic.
If anything, it is PERFECT.
Not close to the perfect but PERFECT.
No Doubt about it.
If you need to get to the core then read on...
Your confusion deals with "opposite".
This official SC has contrast.
What are contrasts in essence?
They are "opposites".
Opposites in GMAT Verbal are never POLAR opposites.
They are ALWAYS LOGICAL opposites.
What you are doing?
From where your confusion stems?
You are viewing contrast as polar opposit whereas it ought to be viewed as logical opposite!
What does all this mean?
You need to know only one thing.
Polar opposite is not logical opposite!
That's it.
You need to know only this.
Now what is the difference between polar opposite and logical opposite?
lets have few examples...
What is the opposite of BLACK?
White.
White is polar opposite of BLACK.
However in GMAT SC, opposites are never polar opposites. Opposites are always LOGICAL opposites.
Logical opposite of BLACK is not BLACK and ,therefore, in GMAT the opposite of Black is NOT black
i.e,
Black
logical opposite is not Black
polar opposite is white.
However, in GMAT we have logical opposite, so opposite of black in GMAT is NOT black.
Similarly,
opposite of white is NOT white (to consider black opposite of white will be incorrect)
what are the possible values?
what are the possible opposites?
Red, yellow, purple, black, silver, golden, etc.
opposite of dry is NOT dry (to consider wet opposite of dry will be incorrect)
what are the possible opposites?
mild dry, moderately dry etc
Similarly, opposite of fine is NOT fine
opposite of rich is Not rich (to consider poor opposite of rich will be incorrect)
opposite of poor is Not poor (to consider rich opposite of poor will be incorrect)
Similary, opposite of and is Not and
Similarly, opposite of A and B is Not A and B
Mr. Smith is a doctor(D) and teacher(T)
If you have to show ALL possibilites( possible combinations of D and T), how will you show it?
DT
00--> not Doctor and not Teacher
01--> not Doctor and Teacher
10--> Doctor and not Teacher
11--> Doctor and Teacher
( note 0 means OFF and 1 means ON)
These are all the possible combinations of D and T ( Doctor and Teacher )
The statement,"Mr. Smith is a doctor(D) and teacher(T)" refers to which single combination?
Last one!
How do we refer the other three combinations of D and T ( Doctor and Teacher )
Other three combinations are Logical opposites of D and T
Therefore,
Unlike Mr Robert, Mr. Smith is a doctor(D) and teacher(T)
What are all possibilities for Mr Smith?
and
What are all possibilities for Mr Robert?
All possibilities for Mr Smith and Mr Robert:
there is only one possible combination for Mr. Smith,
BUT
there are three possible combinations for Mr. Robert.
Possibilities for Mr. Smith
DT
00--> not Doctor and not Teacher
01--> not Doctor and Teacher
10--> Doctor and not Teacher
11--> Doctor and Teacher (only this one is possible now)
Possibilities for Mr. Robert
DT
00--> not Doctor and not Teacher
01--> not Doctor and Teacher
10--> Doctor and not Teacher
11--> Doctor and Teacher
only Last one is not possible now. All first three are possible.
What does this mean?
What does that mean that All first three are possible?
It means that of these three,
00--> not Doctor and not Teacher
01--> not Doctor and Teacher
10--> Doctor and not Teacher
Mr. Robert is only ONE.
Just as Mr. Smith has only one combination, Mr. Robert has only one combination
However,
Mr Smith has also one possiblity
BUT
Mr Robert has three possibilities.( out of these three possibilities, he is actually one just as Mr Smith is one)
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