Seems good enough for evolution. But, there's a good argument that Strong AI isn't practical in a reasonable amount of time: human evolution took 14 galactic years. Of course, we don't know to what degree sentience is learned versus inherited. It does kind of bother me that debates about Minsky always seem to degrade to Strong AI. Yeah, they failed to accomplish that. And relative to Strong AI, things like natural language processing are modest. But relative to everything else we've achieved in computer science, I think things like Watson, Siri, and Wolfram Alpha are rather significant. And those are only the consumer-visible ones. Machine learning is used by everything from search engines to bioinformatics. Most of which in some way extend Minsky's work. Even his brain-oriented work like Society of Mind. The book addresses numerous subjects like learning meaning, language processing, ambiguity, and spatial perception, which are equally applicable to various Weak AI systems.Random guessing is as bad as it gets.