"So you say, and so your papers say, but those could be forgeries, you admit?"
"Yes, that's possible," he replied softly, "but it's so easy for you to check with my department."
"Undoubtedly there is someone there by that name," Ginger interjected. "But that doesn't prove your identity."
"I have here a list of members of your alleged department. If you actually belong to it you should be able to give me their names."
He nodded slowly. "A fair test."
"Then call them off, beginning with the department chairman. And if you make a single mistake, I'll have my girl shoot you on the spot."
Ginger raised her blaster eagerly.
A minute later she lowered it in disappointment.
"Very well," I said. "You weren't lying. Now tell me why you came here. And be brief, if you please. Because, fifteen minutes from now I want you on your ship heading back to wherever you came from."
The professor stared at me for a moment. "The truth is, I came to see you."