YOU SAID:

there is no chance anything exists

INTO JAPANESE

何かが存在する可能性はない

BACK INTO ENGLISH

There's no chance something exists.

INTO JAPANESE

何かが存在する可能性はありません。

BACK INTO ENGLISH

There is no possibility that something exists.

INTO JAPANESE

何かが存在する可能性はありません。

BACK INTO ENGLISH

There is no possibility that something exists.