Re: and supporters of expansion in space
That's where I got the reference. Should have said, "Heinlein Star Gates!"
"Psychologists one locked an ape in a room, for which they had arranged only four ways of escaping. Then they spied on him to see which of the four he would find.
"The ape escaped a fifth way."
- from "Tunnel in the Sky"
One of my favorite bits in a Heinlein book. Say it all about human development and unexpected technologies.