"Let's stop for a moment and examine how well this account fits in with the evidence we have. First, the original problem of Charlie's human form. Well, that's answered: He was human—descended from the same ancestors as the rest of us and requiring nothing as unlikely as a parallel line to explain him. Second, the absence of any signs of the Lunarians on Earth. Well, the reason is quite obvious: They never were on Earth. Third, all the attempts to reconcile the surface geography of Charlie's world with Earth become unnecessary, since by this account they were indeed two different planets.

"So far so good, then. This by itself, however, does not explain all the facts. There are some additional pieces of evidence which must be taken into account by any theory that claims to be comprehensive. They can be summarized in the following questions:

"One: How could Charlie's voyage from Minerva to our Moon have taken only two days?"

"Two: How do we explain a weapons system, consistent with the Lunarian level of technology, that was capable of accurate registration over a range extending from our Moon to Minerva?

"Three: How could the loop feedback delay in the fire-control system have been substantially less than the minimum of twenty-six minutes that could have applied over that distance?

"Four: How could Charlie distinguish surface features of Minerva when he was standing on our Moon?"

Hunt looked out from the screen and allowed plenty of time for the audience to reflect on these questions. He stubbed out his cigarette and leaned forward toward the camera, his elbows coming to rest on the desk.

"There is, in my submission, only one explanation which is capable of satisfying these apparently nonsensical requirements. And I put it to you now. The moon that orbited Minerva from time immemorial up until the time of these events fifty thousand years ago—and the Moon that shines in the sky above Earth today—are one and the same!"

Nothing happened for about three seconds.

Then gasps of incredulity erupted from around the darkened room. People gesticulated at their neighbors while some turned imploringly for comment from the row behind. Suddenly the whole theater was a turmoil of muttered exchanges.

"Can't be!"

"By God—he's right!"

"Of course . . . of course . . . !"

"Has to be . . ."

"Garbage!"

On the screen Hunt stared out impassively, as if he were watching the scene. His allowance for the probable reaction was well timed. He resumed speaking just as the confusion of voices was dying away.