YOU SAID:

it is by that far that I know the real fact.

INTO JAPANESE

私が本当の事実を知っているのはそこまでです。

BACK INTO ENGLISH

That's as far as I know the real facts.

INTO JAPANESE

それは私が知っている限りの本当の事実です。

BACK INTO ENGLISH

That's a true fact as far as I know.

INTO JAPANESE

それは私が知る限り本当の事実です。

BACK INTO ENGLISH

That's a true fact as far as I know.