Why has AGI not been created yet?

How close are we to creating artificial intelligence? Why has AGI not been created yet? In this piece - originally appearing as an article in Aeon, 'Creative Blocks' - David Deutsch answers these questions.
Starting with a history of computation, he goes on to criticise the existing philosophical approaches to AI and AGI, and how these have been confused.
This article can be read here:
aeon.co/essays...
Citation for Richard Byrne's paper 'Imitation as behaviour parsing':
pdfs.semantics...
► Related essay by David Deutsch, on the 'reward and punishment' theory of AGI:
• Possible Minds - Beyon...
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