Maseches Bechoros Daf 23

Says the Gemara a quarter of the way down, esve.

Eifer kasher.

When we talk about eifer para, which we know is used and utilized in order to be, um, metamei those who are tahor, or to be m- metahir those who are tamei more accurately.

Uh, but it also has a ne- a, a double s- a double-edged sword, which is that it too is metamei.

So if you have eifer kasher which can be metamei, and it's nisaref, she nisaref be-eifer makleh, and it gets mixed up with the ashes of your average stove, just regular ash, which is not tamei.

So hol- holchen achar harov letamei.

We just look which one is fifty-one percent or more.

If it's gonna be the eifer kasher that's going to be more, then everyone's gonna be tamei for touching it.

If it's gonna be the eifer makleh, so then it's going to be tahor.

So says the Gemara as follows.

The eifer makleh hulah letamei.

That's difficult.

Why is that difficult? Because ve'i amras tumah k'man d'ise damei.

If you wanna say like Rav Yirmiah that really the tumah has always been there, it's just laying dormant and it's chozer veneor.

Well, when you're dealing with rov and you touched it, I could understand part of it.

I could understand, says the Gemara, nehi d'bemaga lo metamei.

I could understand if I touch it with my hands.

Well, kol deruba m'ruba parish.

Whatever I touched is based on the rov, okay? The rov is, uh, eifer makleh, so it should be, it should be totally fine.

However, it should be letamei b'masa.

If I pick up all of it, if I pick up all the ash, there's definitely something in there that is tamei, which is eifer kasher.

It's a paradox, and we call it eifer kasher [laughs] because eifer kasher is eifer para, but eifer para is metamei.

So again, it's paradoxical language if you're not holding an, uh, an eifer, an eifer pash-- an eifer para, which is a sh- eifer kasher.

So says th- this-- there's a kasha within this.

What-- why is, why is this even true? Why would you say that there's tumas masa? Rov gets rid of everything.