"It must have been when the robots were destroying themselves," Marshall recalled.

You know as well as I do that my robot could easily destroy your whole encampment.

Your city let a rogue robot get in and destroy your central computer,?

"If commerce is so welcome, why did your robots destroy themselves?"

"In other words, the robots had destroyed evidence," said Baley, annoyed.

For some reason, the robots were systematically destroying selected items in their storehouse?

There must be indications of some kind in the control room if the robots haven't destroyed them.

They cannot expect robots to destroy or injure themselves in aid of some human whim.

Why did you order the robots to destroy what was left of the growing corn?

What happened was that the robot destroyed the President.