Yeah , it 's an  it 's an evidential. It 's sort of semi - grammaticalized. People have talked about it this way. And you know , you can do sort of special things. You can , th put just the phrase " I think " as a parenthetical in the middle of a sentence and so on , and so forth.
Yeah.
So
Actually one of the child language researchers who works with T Tomasello studied a bunch of these constructions and it was like it 's not using any kind of interesting embedded ways just to mark , you know , uncertainty or something like that.