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It seems "knowable" for you requires a something (if only a thought). If there isn't a something you haven't got a "knowable", thus the state of "nothing known" is a state of unknowable. I guess I would maintain that you just have a state of "nothing manifested". Paradoxes only exist when something is not understood fully. If you exist yet you are not manifesting anything, than to say you know you exist, well, you've just stated that something is known... Catch-22. I will agree that at this point that I can't wrap my wits about that one.

Maybe it's just a problem in definition. How the something that manifests came to exist might well be unknowable. But the manifester does exist, that much I do know - we're here.
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UNKNOWABLE = “absence of manifestation”
YOU EXIST = “You is manifested” = “You is knowable” = “You is something”
There is no paradox. People just bought it from Hubbard that
A beingness can exist that is not manifested. (This is a falsehood).
It is a falsehood that “you” can exist and still be not manifested. The truth is that “you” is a consideration. It is an identification with thought.
A beingness, at any level, consists of space-energy-matter and time. (This is the truth).
How is a manifestation perceived = This is part and parcel of manifestation.
How does a manifestation come about = UNKNOWABLE
I believe that
(1) THOUGHT is manifested due to the effort to know the UNKNOWABLE.
(2) A manifestation may result from the effort of UNKNOWABLE to know UNKNOWABLE.
(3) But this is a consideration or THOUGHT, and it puts us back at (1).
We are on a merry-go-round.
This whole universe exists because of the effort to know the UNKNOWABLE.
Manifestations are taking place to figure out what is not manifested.
Stable data, such as, "I" or thetan, is the result of identification with a consideration.
What I am writing here could itself become a stable data for some.
This is fun, fun, fun!
Or,
"Oh! Fuck!"
.