A. Professor Bumble worked hurriedly on his new time machine. Fifty times before, it had hopelessly failed. He was sure it would work this time.
A crowd gathered to watch the Professor enter his machine.
B. Ten minutes passed--then thirty minutes--and one hour. The people waited patiently. But one man could wait no longer. He opened the door to the time machine. The Professor was gone!
What do you infer happened between Event A and Event B?
1. The professor disappeared into another time period.
2. The professor stepped into the time machine and it worked.
3. The time machine failed again.