YOU SAID:
Everything is either a potato or not a potato
INTO JAPANESE
すべてがジャガイモであるか、ジャガイモではないかのどちらかです
BACK INTO ENGLISH
Everything is either potatoes or not potatoes
INTO JAPANESE
すべてがじゃがいもかじゃがいもではない
BACK INTO ENGLISH
Not all potatoes
INTO JAPANESE
すべてのジャガイモではありません
BACK INTO ENGLISH
Not all potatoes
You've done this before, haven't you.