Rabbi Aryeh Lebowitz

So, first of all, those Rishonim that hold that Pas Ava means any thickness at all.

There's some Rishonim that hold Pas Ava means Pas Meruba.

No matter what level of thickness, it's going to be a problem.

So we try to stay away from thicker matzos.

That's one reason why we stay away from it.

And probably also because of the Din of Shemur, that you have to be Shomer from Chimutz.

That's the Shulcharach Paskins.

Part of Shemur matzos, you have to be Shomer from Chimutz.

You have to protect it very carefully from Chimutz.

The best way to protect it is to make the kind of matzo that could not ever become a Hametz because it's so thin and you bake it so quickly it never would possibly have a chance to become a Hametz.

Now,

can't make tefach wide matzahs.

Notable, the Ramah doesn't say a word.

The Ramah is silent.

You just can't make matzahs that are tefach thick.

why can't you make a tefach thick?

Maybe the maybe the heat of the fire is not going to completely go through and through, but there's going to be some dough inside that's going to become while it's baking.

If it's less than a tefach, then you're good.

So then he says, let's say even you should be careful about.

So what does the Mishavur tell us?