Would we eat them? Assume for a moment (no matter how unlikely) cows can somehow communicate with humans vocally and as easily as how we communicate with each other, would you (meat lovers) continue to eat cows? The reason I say this is because through vocalization of thoughts and emotions these sentient beings may be attributed a higher status than how we perceive them. I know human beings are indeed guilty of anthropocentric ideology when it comes to humans vs animals, but it would make an interesting conversation! But in the case of a talking cow, does the verbal expression of ideas warrant a cow the same rights as a human?