Re: Huh?
Niven played the 'what if?' game that is at the heart of true SF superbly. For instance, 'what if teleportation booths can be created?' - and then worked out the consequences*
Some say that the phaser would be the last invention of a modern society.
The consequences are, once you create a device that could easily and conveniently kill someone without leaving any trace, co-workers would be disappearing every day!!!