I've seen people call out "is is" all the time, which is sometimes wrong, but often not.
I've seen people call out "is is" all the time, which is sometimes wrong, but often not.
Yeah. "What he is is a liar" is grammatical. But "The thing is, is he's a liar" is not, though quite common. (I think Obama was a power-user.)
Exactly right! I've seen video montages where people have tried to collect examples, and only half of them were incorrect.