Sometimes being close counts ñ in horseshoes and romance, for example. For SETI, however, itís hard to argue that a close call is any better than no call. After all, even if a signal mimics ETís expected emission, what good is it if we eventually learn that it was only the carrier from a telecommunications satellite, ricocheting off the backup structure of our antenna? Ergo, SETI is often described as a one-bit experiment: there are no partial discoveries...........

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and of the four the final is most strong