"Gibbard's work was a bombshell. That was very exciting. I didn't know about Satterthwaite's work for a couple of years, but it was very much the same thing. I had taken the liberty of abstracting from manipulability in my thesis and I never went back to that issue. What's surprising is not really that there is an impossibility of non-manipulability, but that the issues should be essentially the same. That strikes one as a remarkable coincidence."