"The Psychologist seemed about to speak to me but changed his mind. Then the Time Traveler put forth his finger towards the lever. “No,” he said suddenly. “Lend me your hand.” He took the Psychologist’s hand in his own and told him to put out his forefinger. So that it was the Psychologist himself who sent forth the model Time Machine on its interminable voyage, we all saw the lever turn. I am absolutely sure there was no trickery. There was a breath of wind, and the lamp flame jumped. One of the candles on the mantel was blown out, and the little machine suddenly swung round, became indistinct, and was seen as a ghost for a second perhaps, as an eddy of faintly glittering brass and ivory; and it was gone — vanished!
The Psychologist recovered from his stupor and suddenly looked under the table.
We stared at each other. “Do you seriously believe that machine has travelled into time?” said the Medical Man.
“You mean to say that machine has travelled into the future?” said Filby.
“Into the future or the past” said Time Traveler.
After an interval, the Psychologist had an inspiration. “It must have gone into the past if it has gone anywhere,” he said.
“Because I presume that it has not moved in space and if it travelled into the future it would still be here all this time since it must have travelled through this time.”
“But,” said I, “If it travelled into the past it would have been visible when we came first into this room; and last Thursday when we were here; and the Thursday before that; and so forth!”
“That’s a simple point of psychology. It’s plain enough and helps the paradox delightfully. We cannot see it, nor can we appreciate this machine, any more than we can speak of a wheel spinning, or a bullet flying through the air. If it is travelling through time fifty times faster than we are, if it gets through a minute while we get through a second, the impression it creates will, of course, only be one-fiftieth of what it would make if it were not travelling in time.” He passed his hand through the space in which the machine had been.
“Would you like to see the Time Machine itself?” asked the Time Traveler. And therewith, taking the lamp in his hand, he led the way down the long, draughty corridor to his laboratory. “Look here,” said the Medical Man, “are you perfectly serious? Or is this a trick, like that ghost you showed us last Christmas?”
“Upon that machine,” said the Time Traveller, holding the lamp aloft, “I intend to explore time. Is that plain? I was never more serious in my life.
” None of us quite knew how to take it.
I caught Filby’s eye over the shoulder of the Medical Man, and he winked at me solemnly."
Q. Which of the following statements can be inferred from the passage?