"Unclassified as to age, Smith. It's not important. I wonder, are you dominant or receptive?"
"I'm a man. Male. Dom—"
"That doesn't matter. Smith, tell me, how long has it been since anyone from the planet Earth has attended the school?"
Smith said he didn't know, but, to his knowledge, no one from Earth had ever been here. "We don't get around much any more. It's not that we can't. We just go and then we don't like it, so we come back to Earth."
"Well, from the looks of you I would say you are a receptive. Very definitely receptive, Smith." Given sufficient data, the registrar could not be wrong. Given sufficient data the registrar could tell you anything you wanted to know, provided the answer could be arrived at from the data itself. "The male and female distinction no longer holds, of course. On some planets the female is dominant, on some she's not. It's generally according to the time of colonization, Smith. When was Earth colonized?"
"It wasn't."
"What do you mean, it wasn't?"
"We were always there. We colonized the rest of the galaxy. Long ago."
The registrar clicked furiously, expressed itself still more femininely this time. "Oh, that planet! You certainly are the first, Smith. The very first here at the school. Room 4027, dominant companion." Neuter voice again. "That's all, Smith of Earth. Next."
The vaguely purple-skinned man stood before the registrar, winked at the flashing lights. "You know, now I can see what they mean when we're told of a missing link in the chain between man and animal. Old Earthsmith...."