פירוש על עבודה זרה 99:4

Above R. Yitzchak had said that if we know that the stones fell from the Mercurius, they are permitted. But neither the sages nor the rabbis in the mishnah say exactly that.
We should note that the terminology here is unusual. Usually the word ורמינהו means that two tannaitic sources disagree. But here it seems to be a difficulty from a tanna on and amora.

Rava here emends the first source so that it reads “found” and not “fell.”
There is still something strange here, for if the word is “found” then what is the sentence really telling us.