While I agree with your sense, I believe he meant if any looked imperfect in relation to the others. Some bearings can scratch or even "chip" in certain races. Particularly with BB races I find that there is always some radial compression and it causes very odd bearing wear on my other bikes, though that could just be my funky pedaling style.
Don't be so sure. The wizard in question speaks perfect English. He said what he said.
Bearings don't scratch or chip. Look it up.
What is this radial compression business?
What is this very odd bearing wear business? Bearing wear is a well understood part of engineering and I doubt you have found something not yet described and understood.
There is no mechanism in a ball bearing for one ball to wear smaller than the others. By definition, the nanosecond one ball reduces in size, its wear stops instantaneously because the load is taken up by the adjacent balls. They all wear uniformly, no matter what language you speak or observe them in.
Don't defend him. He has a record of dropping nonsense and then disappearing.