Probably best not to apply inference of belief systems to delusion. ( Do you see why? )
No. My delusions may well stem from my shaky beliefs. Or the
other way. I can't really tell, since I don't know what is the cause.
But, surely my sensory input is somehow responsible for forming me?
eg. If your television is giving you 'special' messages, then you may be the best logician in the world, but it's not going to stop the telly from giving you messages even if your belief system is that televisions are not talking to you personally.
But, this isn't a delusion of grandeur. If I believe that I am the one, doesn't that
make me 'special'?
am not (from an objective point of view)
the center