Tefillah Cancels Prophecy

The Bnei Yissochor once quoted the Gemara (Megillah 16A) that says: “Anyone who says a wise thing, even if he is a non-Jew, is called a chochom.” He explained: Even the astrologists who can see the future by looking at the stars possess chochmah. So what will happen if they foretell a drought and a Jew comes along and prays to Hashem for rain? Of course, the tefillah will be heard and accepted.