YOU SAID:
failing must be nice when you are dumb
INTO JAPANESE
あなたが愚かであるとき、失敗はいいに違いない
BACK INTO ENGLISH
Failure must be good when you are stupid
INTO JAPANESE
あなたが愚かであるとき、失敗は良いに違いない
BACK INTO ENGLISH
Failure must be good when you are stupid
That didn't even make that much sense in English.