Question: What was the name of Stephen Wolfram's book that referenced Wolfram's 2-state 3-symbol Turning machine?
Sentence (from "Singularity Summit"): Some speakers have included Sebastian Thrun, Rodney Brooks, Barney Pell, Marshall Brain, Justin Rattner, Peter Diamandis, Stephen Wolfram, Gregory Benford, Robin Hanson, Anders Sandberg, Juergen Schmidhuber, Aubrey de Grey, Max Tegmark, and Michael Shermer.
Relevant evidence: No