Eldon, who has schizophrenia, experiences delusions. it is likely that

I believe the answer is: he has limited awareness of how illogical they are
The reality that we see everyday is very subjective and could drastically change depending on our state of mind.
People who have a schizophrenia tend to be in a constant/long-term delusion and would tend to perceive their illogical behavior as normal.

Sheet stain on pee wee's sheets