Alternate Realities: A Scifi Book Club discussion

What do you think causes Mike's silence?

I assumed that enough of the essential components for his continuity had been destroyed and that, even after repairs, the essential combination of factors that led to his sentience arising in the first place was never duplicated.

On an interesting aside, the Turing Test has just been passed for the first time. http://www.watoday.com.au/digital-lif...

Larissa wrote: "On an interesting aside, the Turing Test has just been passed for the first time. "

This question seems to be well timed then.