YOU SAID:

I do believe in facts and I believe that they exist.

INTO JAPANESE

私は事実を信じていますし、それが存在すると信じています。

BACK INTO ENGLISH

I believe in the facts and believe that it exists.

INTO JAPANESE

私は事実を信じ、それが存在すると信じます。

BACK INTO ENGLISH

I believe in the facts and believe that it exists.