something stupid

You may be saying stupid things if you are using any of these--

I (we) just naturally assumed
This can't be right
I (we) cannot have made a mistake; I (we) cannot be wrong
I mean; but I meant
There must (has to) be  a
I heard; she (he, they, it) said
I read that into; interpreted that as
Surely you don't think
I can hardly believe
This doesn't make sense to me