I have two siblings; we're locked in a war.
One of them can grind me into the floor.As for the other, he could never win.
My razor-sharp wit makes me stronger than him.
Who or what am I?
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the scissors from Rock–paper–scissors
I have two siblings; we're locked in a war.
Rock and paper
One of them can grind me into the floor.
Rock, of course, smashs sissors
As for the other, he could never win.
My razor-sharp wit makes me stronger than him.
Scissors cut paper
My first thought was:
Rock Paper Scissors
You're the scissors
My thought is that you are
Scissors
Your sibling that can "grind [you] into the floor" is
Rock
Your "other" sibling is
Paper
Explanation:
You and your siblings represent rock, paper, and scissors, from the game of the same name. Your "razor-sharp wit" indicates the blade of scissors. Your sibling can "grind you into the floor" because rock beats scissors. Your other sibling could never win because paper loses to scissors. As you said, you are "stronger than him". In addition, you are all locked into a war because of the trifecta that you represent. Rock > Scissors > Paper, but Paper > Rock. None of you could ever win against both the others.