Is it grammatically correct to use "that that" in a sentence, or should one use alternatives instead?
I've heard people use and seen people write sentences with "that" occurring twice consecutively. Is this grammatically correct, or is it a construct that should be avoided?
I'm having trouble remembering examples of this idea that don't lend themselves to simple rephrasing. For example:
I saw that that window was open.
I'm not sure this is a good example, but nevertheless, I wonder about the construct.