020a – Bechoros - Page 20a – 020a - הלוקח בהמה פרק שלישי בכורות דף כ, ע"א

So therefore, Machwarta that the-- it's, uh, clear that Rabbi Yishmael, the Rabbi Yishmael who says that the baby that was born by the purchaser after the year, and he holds that it's still a «safek bechor» in the Mishnah.

So we have to say that Rabbi Meir «sviraleh», that he must hold like Rabbi Meir, the «choysh lemeyuta» who worries about the minority.

And since there's a minority of animals that don't give birth within the year, Rabbi Yishmael is concerned that this behemoth may be from that minority, and she hasn't given birth yet, and this baby is the bechor.

Rabbi Amar-- Ravina gives another answer.

Ravina says, «Afilu temai Rabana», even if you're gonna say that Rabbi Yishmael holds like the Rabana, that we go b-after the majority, and we do not worry about the minority, still, we can say that «ki ozzil Rabana basar ruba».

When do the «chachamim» go and follow the majority? It's only «beruba delei talui bemaaseh».

It's only in the majority where the case where the «rov», the majority does not hinge on an action.

Like for example, when we talk about a «katna» or a «katana» with regards to yibum, that they have become fit to give birth on their own without any act.

Nothing needs to be done.

«Avol ruba de talui bemaaseh», but if it's a majority which hinges on an act, like it has to happen that the behemoth has to become pregnant, and that hinges on mating, uh, from a male and, um, there is a possibility that maybe, uh, a male did not mate with her, then the «chachamim» don't go after the majority because it doesn't have to have-- Something has to take place in order to make that majority.