Following through on a link... yes I know, I also read manuals; I came to ‘this page doesn’t seem to exist’. That set me off. Can a nonentity seem to do anything, particularly exist? Only, I think, if its existence is camouflaged so perfectly that it is not apparent. Its non-existence lies so perfectly, sublimely, congruent with reality. Its nonness is an onness as it were. The which it is. This you see is an example of the pramana (valid means of knowledge) known as anupalabadhi i.e. non-apprehension of existence. I expected to click to something, a background of purported existence was established which was flouted. I acquired a non-perceptual knowledge for it is clear that I cannot see what isn’t there. There is a Nyaya school which claims that this knowledge is an inference anuamana (pramana) from a non-perception but it seems to me that an inference even if Sherlockian fast is contrary to the immediacy of this knowledge.
Absence makes the mind to ponder.