Answer: No, it is not ethical for Mr. Thorne to kill his adopted son. The definition of ethical is "relating to moral principles or the branch of knowledge dealing with these." It is unethical if you are killing someone because the other person is also a human with a soul. You take away someone's life, which is against many ethical principles. Killing an adopted son is even worse, as that person has likely suffered a lot already, and taking away his life is very morally wrong.
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