Does anyone know where I can find this rabbinical anecdote once used in explaining paraconsistent logic?

I am looking for a quotation of the tale described below. I know it appeared at the beginning of an article or text on paraconsistent logic but I can't find that source nor any other authoritative source.

Two disputants come to a rabbi for a resolution. After hearing the first case, the rabbi says, “You are right.” When he hears the antagonist’s response, he says, “You are also right.” An observer says, “Rabbi, you said person A and person B are both right; they can't both be right!” The rabbi responds, “you are also right!”