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Logic

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"Oh, shut up!" says Claudia, blushing."1 may read the astrology column, but I certainly don't believe it. I just read it for fun. But, the fact is, during the past twenty-five years there have been thousands of alleged sightings of UFOs, and not a single one has led to any solid evidence of their existence. What do you make of that?"
"I think we should look at this situation the other way around," Ralph says."Up until now, nobody has shown that UFOs don't exist, so I think we should give those people who claim they have seen them the benefit of the doubt. We should believe in UFOs and extraterrestrials until the sightings are proven false."
"Well, okay. Let's suppose,just for the sake of argument, that I admit the existence of
UFOs and t~eir little green drivers. How are we supposed to respond to them? What are we supposed to do?"C1audia asks.
"For starters, we should extend an open invitation to them," answers Ralph."They may come from a dying planet where millions of their compatriots desperately strug­ gle for survival.Their sun may be burning out, their water supply exhausted, and their soil poisoned with toxic chemicals. Surely they deserve a second chance on a new planet." "Maybe so," Claudia says in a patronizing tone."And now that you mention it, we probably have a legal obligation to let them in. Our current immigration laws say that we have to admit at least ten thousand applicants annually, from every major nation. If those aliens would just sign the right papers, we'd have to give them permanent resi­ dency. However, what worries me is, they may have the wrong intentions. After all, didn't they conduct experiments on those people they abducted?"
"Yes, but don't we experiment on animals? If the animals don't complain, why should we? Also, medical experimentation often leads to wonderful new cures.
I'm certain we have nothing to worry about," says Ralph,

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