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Based on the verse (Lev. 11:43), אל תשקצו את נפשותיכם - "do not make yourselves detestable," there is indeed a halachah that one may not eat things that are disgusting to the average person. Shulchan …

Apparently not. Rema (Orach Chaim 452:1) says that "hag'alah is worthless if the water isn't boiling," and that therefore "one must be careful not to insert any dishes [to be kashered] until the water …

It looks like this is in fact the subject of a machlokes between R' Yochanan and Reish Lakish (Yerushalmi Nedarim 6:1 (26a)). R' Yochanan says that one who eats "a treifah that became neveilah" is ind …

Shulchan Aruch, Yoreh De'ah 66:10 (from Kerisus 21b) states: "Human blood, if it is separated from his body, is forbidden because of appearances (maris ayin). Thus, if one bit into a piece of bread a …

Seems like it might depend whether you're an Ashkenazi or not. In principle, as you say, flour (that never became wet, as in the comments to the question) mixed with liquids other than water can't be …

That is one reason, sure; in general, Hashem gave us rules of what to do and not to do, in order to refine us (Bereishis Rabbah 44:1). But aside from that, the various non-kosher animals have their r …

It's pretty much the consensus that arneves is the hare (or rabbit - they're different species but are pretty closely related). Various translators identify the shafan as another species of hare (or …

For #2: Rambam says as much in Moreh Nevuchim, part 3. In ch. 26 he writes (Kapach translation, text online here): אבל לאמיתו של דבר, כיון שהביא ההכרח לאכילת החי, הייתה הכוונה להקל מיתתו במה שקל ל …

Do these dishes really belong to the kosher caterer? (If after one use they're handed over to the airline, then I would assume not - unless indeed they have an arrangement where the airline compensate …

Teeth aren't an issue - unlike with land animals and birds, kosher fish can be predators. (In fact, barracuda is kosher - and you don't get much more toothy than that!) Fish don't need a mesorah to b …

This was brought to mind by this question: What are the rules about joining your co-workers (or the like) for a meal in a non-kosher restaurant, but bringing your own food? Is it prohibited as mar'is …

I found a couple of statements about this on ou.org: "To avoid confusion, the OU has chosen not to use the D.E. categorization. We feel that many people will not be familiar with the ramifications of …

There's no specific mitzvah to eat meat (except in connection with certain sacrifices, but those are in abeyance until the Holy Temple is rebuilt - may it be soon). There is a mitzvah to enjoy Shabba …

You'd have to do something to force the water to cover the side flanges (or rims) of the sink too (such as by dropping in a hot stone), but otherwise I'd think it would be halachically fine - it shoul …

One possibility: see the opinion of R. Raphael Saffra cited in Shoshi's answer about the Tablet-K hechsher, that cheese made without real rennet is permissible. While this opinion isn't generally acce …