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Should you use a comma between the two "that that's" in a sentence as in "that that might be a consideration" or not?

marked as duplicate by RaceYouAnytime, Edwin Ashworth, Hot Licks, David, FumbleFingers Jun 19 '17 at 13:53

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  • Except in rare circumstances, simply remove a that. – Stu W Jun 19 '17 at 0:25
  • Generally, you can use "that that" without a comma or replace the combination with "what." "What is wrong is wrong." "That that is wrong is wrong." Neither is grammatically improper. – RaceYouAnytime Jun 19 '17 at 0:27
  • What rule would lead you to insert a comma? – Hot Licks Jun 19 '17 at 0:57
  • that that might be a consideration seems more like a fragment than a sentence. This question could be improved with a better example. – J.R. Jun 19 '17 at 1:46
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That introduces a restrictive clause, which includes information vital to the sentence, so you don't need a comma for it.

(Source: The Blue Book of Grammar and Punctuation.)

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