YOU SAID:

There are known knowns and known unknowns, but there are also unknown unknowns.

INTO JAPANESE

既知の未知数と既知の未知数がありますが、未知のものもあります。

BACK INTO ENGLISH

There are known unknowns and known unknowns, but some are unknown.

INTO JAPANESE

既知の未知数と既知の未知数がありますが、いくつかは不明です。

BACK INTO ENGLISH

There are known unknowns and known unknowns, but some are unknown.