Hi Jim,
Funny, I was just thinking re the reply to your point, the second before I
read it. What I was going to say was: I read a lot of Harnad many years ago,
and I was a bit confused then about exactly what he was positing re the
intermediate levels of processing - iconic/categorical.
It's simply I think - and I stand to be corrected - that he has never pushed
those levels v. hard at all. They are definitely there in his writing, but not
elaborated.
So the only enduring impression he has left, IMO, is the idea of "symbol
grounding" - which people have interpreted in various ways.
As you can imagine, I personally would have liked to see a lot more re those
intermediate levels. And if he had pushed them, someone would presumably have
brought him up in conection with Jeff Hawkins' work.
Jim:MT:
No, a symbol is simply anything abstract that stands for an object - word
sounds, alphabetic words, numbers, logical variables etc. The earliest
proto-symbols may well have been emotions.
My point is that Harnad clearly talks of two intermediate visual/sensory
levels of processing - the iconic and still-more-schematic "categorical
representations" - neither of which I can remember seeing in the ideas of
anyone here for their AGI's. But I may have forgotten something/someone.
Have I?
---------------------
If Harnad's ideas had made the critical difference between true artificial
intelligence and the kind of AI that you have criticized, you would have heard
a lot more about them before this.
Jim Bromer
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