 Why does Eppel indicate an orange light when scanning the planet?
[Transcriber's Note: This etext was produced from Worlds of If Science Fiction, March 1961. Not only would there be life traces on that little moon, but it would be a lively place. The chordata discerner read Positive over most of the surface. Naturally they did not get results at once, nor did they expect to; it required a fine adjustment. But they were disappointed that they found nothing for several hours as they hovered high over the rotation. "Limited," said Steiner, "as though within a pale. As though there were but one city, if that is its form. There was one more test to run, one very tricky and difficult of analysis, that with the Extraordinary Perception Locator. But this might be so varied or so unfamiliar that often both the machine and the designer of it were puzzled as to how to read the results. The E. P. Locator had been designed by Glaser. But when the Locator had refused to read Positive when turned on the inventor himself, bad blood developed between machine and man. It was for this reason that Glaser used that model no more, but built others more amenable. And there was no denying that the Extraordinary Perception Locator (or Eppel) was a contrary machine. On Earth it had read Positive on a number of crack-pots, including Waxey Sax, a jazz tootler who could not even read music. He then narrowed to a smaller area (apparently one individual, though this could not be certain) and got very definite action. Finally it signaled the result, the most exasperating result it ever produces: the single orange light. They called it the "You tell me light." If you find no other spot then we will go down on that one the next time it is in position under us, in about twelve hours." The Little Probe hovered stationary in the light and the moon-town came up under the dawn. "Not a building, not two sticks or stones placed together. And those two ... why, they could well be Earth-people. Timidity has never been an efficacious tool with us." There was a man and a woman, and they were clothed either in very bright garments or in no garments at all, but only in a very bright light. I don't understand that light that surrounds them. "And very little else," said Father Briton, "though that light trick does serve a purpose. "You are not anything till I name you.
 It wants the crew to make their own judgement, because it doesn't know what to make of it.
 It wants the crew to make their own judgement, because it doesn't know what to make of it.  It senses Ha-Adamah's perception.  It senses the "Old Serpent's" perception.  It senses that an omnipotent being.