YOU SAID:
He who skins the duck, duck the skin.
INTO JAPANESE
アヒルの皮を剥ぐ者は、アヒルの皮を剥ぎます。
BACK INTO ENGLISH
He who skins a duck skins a duck.
INTO JAPANESE
アヒルの皮を剥ぐ者はアヒルの皮を剥ぐ。
BACK INTO ENGLISH
He who skins a duck skins a duck.
That didn't even make that much sense in English.