No, it’s not a gemaraish thing, it’s an Even Ezra thing (or however else you pronounce it). Don’t they teach that in school?
Here goes: There was this Ben Zuta who claimed that when the Torah writes ?? ???? ??? ??? ?? ??? ???? “if an ox of a person gores the ox of his friend”, it should be rendered as “if an ox of a person gores his friend, an ox”. Says the Even (Ibn) Ezra, “an ox has no friend, only this Ben Zuta”.