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Okay, no leather shoes for Yom Kippur (or Tisha B'Av). I always assumed if the label said ALL MAN MADE MATERIALS or 100% CANVAS or something like that, that we could trust the label. (Would they really sneak leather in? It's more expensive, right?) Has anyone asked/heard anything about this?

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I'm voting to close this question as off-topic because it asks how to know the constituency of shoes. This is not about Judaism. – mevaqesh Jul 18 at 4:29
@mevaqesh this question is about implementation of a Judaism requirement and is therefore on-topic. See meta.judaism.stackexchange.com/questions/262/… – Isaac Moses Jul 19 at 1:41
@mevaqesh this question is on-topic under the standards proposed by both of the top-scoring answers there. In addition, there is precedent stretching back as long as this site has existed for how-to questions to be part of the scope. Yes, I advocate here for the same site policy I advocated, and at least a plurality of interested community members endorsed, there; that shouldn't come as a surprise. If you'd like to change site policy and invalidate a large number of posts, I suggest that you write an answer there explaining why this site shouldn't share Judaism-implementantion ideas – Isaac Moses Jul 19 at 2:31
@mevaqesh You and everyone else are free to vote how you want, and to explain why. I, similarly, am free to advocate for voting a different way, and I am doing so, based on the arguments I've already expressed in a Meta answer, as well as based on the (at the very least) non-rejection of those arguments by the community, both in voting there, and in years of practice here. Meta is the place for drafting, responding to, and voting on site policies, per se, so I reiterate my recommendation that you consider contributing your ideas there. That would also bring the question more attention. – Isaac Moses Jul 19 at 2:49
@mevaqesh Meta discussion should be on meta. You need to post your arguments there and garner votes there. If you do, the mods and others will happily implement it. Voting to close things against standing practice is not only inappropriate but ineffective. It just makes a mess and wastes lots of people's time. We have a system in place for these sorts of decisions. Please utilize it. – Double AA Jul 19 at 22:32
up vote 0 down vote accepted

If it works for Chalov AKum I would Imagine It works Here too.

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Certainly the logic of "trust in economics and regulation" would apply here; R' Moshe's heter for milk goes beyond that, that "knowing" counts as "seeing" with regards to the enactment on milk. For general kashrus, "knowing" is enough. So if we can apply a kal vachomer from food kashrus (and I'm correct on the metzius), should be fine. – Shalom Aug 19 '10 at 22:26
@Shalom Just to correct a misconception R' Moshe's heter for milk is not based on that, it was based on the government testing that was done on milk. These days the testing is not done, so those who drunk Chalov Akum are not relying on him, but rather on later opinions. oukosher.org/index.php/common/article/… – Ariel Jul 15 '12 at 4:40
@Ariel let's just say it's more complicated than that. R' Moshe has a series of responsa about the subject, and interpreting them is still being fought over today. – Shalom Jul 16 '12 at 6:02

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