General Discussionunknown skill

not known or familiar.
"exploration into unknown territory"
synonyms: undisclosed, unrevealed, undivulged, untold, unspecified, secret, mysterious, dark, hidden, concealed; More
antonyms: known, decided, familiar, well travelled, identified, named, famous, celebrated
(of a performer or artist) not well known or famous.
"unknown artists of the avant-garde"
noun
noun: unknown; plural noun: unknowns
1.
an unknown person or thing.
"she is a relative unknown"
that which is unknown.
noun: the unknown
"our fear of the unknown"
MATHEMATICS
an unknown quantity or variable.
"find the unknown in the following equations"

Is that hard to know for SE-A ape brains?