beyond experience is what we do not know
beyond knowledge
it is pretty straightforward -
you can't further describe this state
it is by definition beyond description
nevertheless
even some great thinkers have lost their nerve and jumped
Plato into Forms
Descartes into God
Kant into the Noumenon
Schopenhaur into Will
Hegel into the Absolute
there is a moral point to the epistemology of radical (or common sense) skepticism
it is that there is a limit to human vanity
and that limit is the end of knowledge
the unknown is the end of vanity
the logic of it is straightforward - clear cut
what we cannot know we cannot know
nothing more to say
no need to say it
full stop
walk away with dignity