Now if you think about it, if I tossed a coin a hundred times, and I'm allowed to withhold from you the answers half the times, then I can convince you that I have a coin with two heads.
你想想 如果我把硬币扔一百次 我可以保留一半结果 不告诉你 然后我就能说服你 我的硬币两面都是人头像