The narrator is often uncertain about how much time has elapsed and about the physical details of the prison. what does this uncertainty suggest about the narrators state of mind

They are mental illness. that what I say

I am not sure about this, but this may mean they are traumatized by the experience, which can cause them either to forget about certain details that their brain chooses to forget, or to altogether not want to recall the horrors of the prison. Without exposure to the outside, they are slowly becoming insane and are confused with no more sense in any form about the world.