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No need to be so dismissive, there's nothing hand-wavy about it. That meat juice you think I'm so concerned about? Hey, I didn't request that an animal be slaughtered for my meal, that was the guy before me. If some of his meat drippings fall on my Impossible Burger, no purity tests have been failed.
I guess its the difference of intent vs the outcome. Yes, you didn't ask for meat but you got some anyways and if you're fine with that, thats cool. If there's meat juice on your vegan burger even by accident its not vegan, I don't think thats too weird of a concept. I'm sure people will bikeshed about this, but if you go look up the definition of "vegan" you'll generally find its "doesn't consume animal products" an…
Oh, hell, no. I'm not looking to Webster's to define my lifestyle choices. You want to get all legalistic about it, knock yourself out. But don't set up a legalistic strawman and then proceed to beat the stuffing out of him.