Grandpa: There you go again, assuming things not proven. Human beings are the supreme species you say. Got any evidence of that? I remember Mark Twain saying, "I care not what race a man may be. Being human being is condemnation enough." And even if we should assume that humans are the supreme species shouldn't that make us recognize the obligation to protect others?

Eddie: Who says we are the top of the food chain? Ever had athletes foot?
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No huevos no pollo.