I’d stay that my belief about other humans or cats or dogs wasn’t really an assumption based on some kind of proof that had to be constructed from a ground of doubting. I’d say it was the type of hinge certainty upon which my world depends and my doubting it would only ever arise for a few minutes in special circumstances. Same as I could ponder gravity turning off and bouncing around the room but this has never happened and seems like it never will, so isn’t really much of a doubt worthy activity, same as questioning my dog’s consciousness.