Paranoia, for me, is simply a feeling of dread that something bad is going to happen. There's a syndrome that is referred to as "sundowning". I think I have some of this. It starts around dinnertime each night. I feel my anxiety level starting to rise. I feel somewhat dizzy & dissociated. And there's a tinge of paranoia in the background. Overnight I'll wake up feeling mildly frightened & paranoid. I don't know how one disputes such thoughts other than to simply allow them to be there, feel their power, breathe into them, & allow them to fade of their own accord... to the extent they will.