BT Šab 92b(20) :תברה מי ששנה זו לא שנה זו‏ : it is a contradiction (thus) the one who taught one did not teach the other
See the entire entry for tḇār, tḇārā v.n. fracture, breaking

BT Šab 92b(20) :תברה "מי ששנה זו לא שנה זו‏ : a contradiction: The one who learned this in the Mishna did not learn that
See the entire entry for tbr#5 n.m. contradiction