Commentary for Berakhot 76:1

אשמעינן טעמא ואשמעינן דהלכתא כרבנן אלא דאמר מוציא מאי קמ"ל ואיהו דעבד לאפוקי נפשיה מפלוגתא

then he would have informed us of the explanation and also intimated that the Halakah is in accord with the Rabbis. But since he said mosi', what does he wish us to infer?" But Rab Zebid acted thus to exclude himself from the divergence of opinion,

Abraham Cohen Footnotes to the English Translation of Masechet Berakhot