Veganism

[Angrboda]

What counts as human is irrelevant to the question of whether there is a distinct thing that being human is.  As long as there is, your question is a red herring.

When I'm asking what counts as being human I'm asking "which things qualify as being human beings?".

You left open the possibility that the property of being human is what makes it okay to kill and eat animals but not okay to kill and eat humans. I'm asking what makes having that property true.

Common usage of the word human implies that the property of being human exists. It matters not how that property is determined to be satisfied. If you aren't abiding by common usage, you are equivocating.