YOU SAID:

I do not think about the things that I do not think about, nor do I know them or about them for that matter.

INTO JAPANESE

私は自分が考えていないことについては考えていませんし、それらについても知っていません。

BACK INTO ENGLISH

I don't think about things I don't think about, and I don't even know about them.

INTO JAPANESE

私は私が考えていないことについては考えていない、と私もそれらについて知りません。

BACK INTO ENGLISH

I don't think about things I don't think about, and I don't even know about them.