YOU SAID:
You are the only one you are certain exists
INTO JAPANESE
あなたはあなたが確かに存在する唯一の人です
BACK INTO ENGLISH
You are the only person you certainly exist
INTO JAPANESE
あなたは確かに存在する唯一の人です
BACK INTO ENGLISH
You are certainly the only person that exists
INTO JAPANESE
あなたは確かに存在する唯一の人です
BACK INTO ENGLISH
You are certainly the only person that exists
That didn't even make that much sense in English.