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

Either it's all potatoes or it's not.

INTO JAPANESE

すべてジャガイモかそうでないかのどちらかだ。

BACK INTO ENGLISH

Either it's all potatoes or it's not.