First things first... you're getting to a more detailed grammar understanding than is actually required on the GMAT. I'm willing to bet that most people who score 99th percentile on GMAT verbal don't actually know or think about these kinds of granular distinctions.
To do well on SC, you don't have to be a grammar
expert; you just have to be good at identifying clear meaning, and recognizing structural pieces of a sentence.
To answer your questions, though...
RBBmba@2014 wrote:
I understand that you seem to convey that THAT is used as a DEMONSTRATIVE PRONOUN in this OG SC. Right ?
(1) But please specify which options between A & B you actually refer to for this particular usage of THAT ?
(2) As per MGMAT Foundation of Verbal book pg #31(Chapter 2),I think, in option A THAT functions as an ADJECTIVE modifying the NOUN direction -- most likely they meant DEMONSTRATIVE ADJECTIVE.
Whereas,according to the MGMAT book, it seems that in option B, THAT functions as an DEMONSTRATIVE PRONOUN. Thoughts?
(3) When THAT is used as a DEMONSTRATIVE PRONOUN, then what is the ANTECEDENT of THAT ? Don't we need an EXPLICIT ANTECEDENT for DEMONSTRATIVE PRONOUNS ?
P.S: Also per MGMAT book, my understanding is that THAT seems to function as a DEMONSTRATIVE ADJECTIVE modifying the following NOUN cat and idea in your each respective above example. Correct me please if wrong!
You're exactly right. THAT is being used as an ADJECTIVE in A, and as a SUBJECT in B. They're both pronouns, though, just as "his" and "he" are both pronouns - one is the adjectival form, and one is the subject form.
In either case, when
THAT is used as a demonstrative in this sentence, the
ANTECEDENT is
[THE DIRECTION] EAST TO WEST.
In most cases in spoken English, THAT will *not* have a direct antecedent. Consider:
[child throws a plate on the floor, breaking it]
Mother: Why did you do that?
THAT in this case stands for the entire action of breaking the plate. The child perfectly understands what "that" means in that context. (And look at how I used "
that context" in the previous sentence, pointing to the entire idea just mentioned, but not to one particular "antecedent").
So, in conclusion:
1) you're right about that distinction between adjective and subject versions of THAT, but the distinction doesn't really matter. THAT has the same meaning in either case: pointing to something previously mentioned, something in front of the listener, etc.
2) A demonstrative THAT doesn't always need a direct antecedent, so don't look for a single word for it to be referring to. It could refer to an entire idea previously mentioned.
3) Don't obsess over this issue. It's not one that the GMAT will test often at all, since it's way more often used in spoken context or a long passage (where an author has room to refer back to a previous idea) than in a single sentence.