For my part I suppose a person might elect to doubt whatever the :twisted: he choses, but of course, there can be worlds of meaning hidden in that small word 'can'.
Can I doubt this, that or the other?
There should perhaps be a distinction between doubt and dismissal.
On those lines, it IS a bit tricky to imagine something in terms of which logic and perception could be, in a strong sense, doubted.
I kind of very much agree with you. I think, and let's take it from there.