YOU SAID:

I am a cat if you are a cat and no one is a cat if we are not.

INTO JAPANESE

あなたが猫なら私は猫だし、もし私たちが猫でなければ誰も猫ではない。

BACK INTO ENGLISH

If you're a cat I'm a cat, and if we're not a cat, no one is a cat.

INTO JAPANESE

あなたが猫なら私は猫で、私たちが猫でなければ、誰も猫ではありません。

BACK INTO ENGLISH

If you're a cat I'm a cat, and if we're not a cat, no one is a cat.