"Are you sure you know what you're doing?" asked Caswell, feeling lightheaded.
The machine snapped back, its pilot light blazing. "Mechanotherapy today is an exact science and admits no significant errors. We will proceed with a word-association test."
"Fire away," said Caswell.
"House?"
"Home."
"Dog?"
"Cat."
"Fleefl?"
Caswell hesitated, trying to figure out the word. It sounded vaguely Martian, but it might be Venusian or even--
"Fleefl?" the Regenerator repeated.