BT Meg 29b(39) :דאי אשמעינן הך הוה אמינא בהא כרב סבירא ליה‏ : if (the Tanna) had imparted a tradition to us about that (case), I would have said that in this (case) he is of the opinion of PN
See the entire entry for hāḵ pron. that (m.&f.)

BT Meg 29b(39) :וצריכא דאי אשמעינן הך הוה אמינא בהא כרב סבירא ליה‏ : it is necessary. If (the Tanna) had imparted a tradition to us about that (case), I would have said that in this (case) he is of the opinion of PN
See the entire entry for šmˁ vb. to hear