Which aspects of human creativity are hardest to surpass by computers?

Which aspects of human creativity are hardest to surpass by computers?

Is it possible to explain metaphors using discourse analysis frameworks, or only with cognitive linguistic frameworks?

For me the real question is… what are the mechanics of converting words into images, and images into words in the human brain?  I tend to think of this mechanism in terms of a “clutch”, or transducer of some kind, and can refer you to my draft webpages on the role of Computational Metaphorics (Draft) in Computational Dreaming(Draft).

See also my Quora answers to:

• What algorithms model the imagination in agent or multi-agent systems?
• Will computers ever be able to think “out of the box”?
• How would you describe creativity using an algorithm?
• How does the brain create abstractions?