Don't let reality get in the way of your GMAT , ramukaka!
In all seriousness: experts on English grammar and style often disagree with each other, even under the best of circumstances. The GMAT has decided that it cares about a certain set of grammar rules, and it interprets those rules in a particular way; the editors of the Economist (my favorite magazine, fwiw) don't always agree with the writers of the GMAT.
In other words: to learn the GMAT's SC rules, you'll want to stick with GMAT sentences.
...
In all seriousness: experts on English grammar and style often disagree with each other, even under the best of circumstances. The GMAT has decided that it cares about a certain set of grammar rules, and it interprets those rules in a particular way; the editors of the Economist (my favorite magazine, fwiw) don't always agree with the writers of the GMAT.
In other words: to learn the GMAT's SC rules, you'll want to stick with GMAT sentences.
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