Issodhos: "This takes us to the point where Conditional Obligations should be enumerated for a unidirectional, one-on-one relationship between individual humans and individual animals, with the intent being to address the acceptable treatment of animals by man."
After considerable cogitation, I have concluded that for the tenderer cuts, the acceptable treatment is "Medium Rare", and for the tougher cuts, the acceptable treatment is slow cooked in a stew or braised in a wine sauce. This is not to say that there aren't alternatives, like curries from the East, mole from Mexico, etc. I'd draw the line somewhere, but would not impose my culinary prejudices on others.