if the vegan society wants to create an additional carve-out for consensual exploitation in addition to its exceptions for practicability and possibility, it's not as though they are unaware of these concepts. they have not done so, and there is no reason to believe they mean to do so.
We're not talking about consensual exploitation. Were talking about behaviors that aren't exploitation due to, or perhaps shown not to be so by consent. There's no need to explicitly mention consent because a) it would needlessly complicate the definition, b) as a practical matter, it almost never actually arises except in these sorts of thought experiments, and c) it's already included implicitly in the concept of exploitation.
Let's look at our original thought experiment: "It's vegan to eat someone who has consented to being eaten."
Usually we don't put too much thought into this sort of stuff because it doesn't really come up much outside of tongue in cheek mention, but I digress.
OK, so off the bat, if you think about it, there are indeed some problems with this statement. There could be systemic issues that made them consent to something harmful because the transactional benefit outweighs the harm to them. So in that sense, you're right, looking directly for exploitation is the more objectively vegan thing to do.
However what if they have a genuine desire to be eaten (non-injuriously or posthumously, hopefully) where there are no confounding influences like above? The absence of exploitation is indicated through consent, in this case, and indeed, without any form of consent the other party would have no way to know of their desire to be eaten.
I think maybe a more realistic example than eating someone would be "Is it vegan to honour someone's organ-donor card?" That seems to me to be a fairly clearcut case of accepting consent as implying non-exploitation.
The absence of exploitation is indicated through consent,
no, it's not. it's exploitation by the barest definition, like exploiting a fallow field or a forest. the definition of exploitation can by synonymously defined as "use". using a corpse is exploiting it. using a corpse which has, with informed consent, been consigned for use is still exploitation.
the barest definition is a synonym of "use". the vegan society could clear up this ambiguity but they have chosen not to do so, and there is no reason to assume they prefer a special definition of exploitation.
If you want the barest understanding, I guess the barest definitions are "good enough". If you want a more sophisticated understanding then you have to take the time to understand the actual philosophical lexicon that the definition relies upon, since, as it points out itself, "Veganism is a philosophy".
Y'know, considering your username is commie, I'm surprised you don't have a better understanding of exploitation, as Marx was really pivotal in developing that philosophical concept.
Approximately 0.01% of lemmy's user base would conflate simple "use" with exploitation. I warned you about sophistry before. If you have knowledge relevant to the domain at hand, put it to use, or stop wasting both of our time.