[_nothing]

I appreciate that explanation. While awkward, I believe "efficiency zone" is a much clearer term to use, or at least it was worthwhile clarifying that that's what you meant.

While I understand what you're saying, I still don't think that ultimately matters when talking about what humans should or shouldn't be doing, what we're supposed to or not supposed to be doing, considering:

1. Human nature is not particularly efficient, and neither is evolution, at least on the surface. Peacocks' feathers are not particularly efficient features for them to develop. Yes, avoiding meat may seem harder than not avoiding meat, but the same could be said for following a religion, or organizing into a governing body, or adhering to some social norm, and yet humans have naturally done those for probably their entire existence. They do so because they at least perceive a benefit for them even if some might disagree on that benefit.

2. The human digestive system is not mono-faceted. It evolved to be multi-use and flexible. You are not using a hammer incorrectly by refraining from using the claw side because you've decided your problem can be solved perfectly fine with the hammer face. You are not using a TV incorrectly if you never visit channel 19 because you don't want to watch whatever is on channel 19.

I stand by my point. The fact that you can efficiently do something doesn't mean you're "supposed to" do that thing. It just gives you the option.

[deltaonefour]

"suppose to" is another loaded and ambiguous word. You can smoke and inject your self with heroin everyday. It's not efficient and it doesn't mean you're not "suppose to" do it.

But there is something off with doing these things and I don't want to get into the pedantics of it all. Not eating meat is in the same general area without the social stigma of being a drug abuser.