I'm an avid reader, often getting through two or three books a week. This partly due to my enviable status as a retired armchair philosopher and partly due to a thirst for knowledge - asking impertinent questions - that goes back as far as I can remember. A persistent feeling I get with all this reading is: (a) there is so much to know and (b) almost every great idea I thought I had has already been written about by somebody smarter than me. At length. Today, I read a special kind of book, namely Melanie Mitchell's " Artificial Intelligence: A Guide For Thinking Humans ". Melanie's mentor was Douglas Hofstadter, someone we have both admired for a good part of 50 years. She "gets" Hofstader in a way few do. Inspired by Hofstader's alarm at the way the fiel d of AI is heading, she provides us a deep, knowledgeable and informative overview of how "AI" actually works and what still remains as its fundamental challenges. As it happens, h...

I have a coffee cup in front of me (I usually do). If I rotate it or move or see it in different light it my brain automatically makes me experience it as the same cup. If you have ever tried to make a computer figure this out, you will see how astonishing this is. What's more, the cup will be seen as the same cup tomorrow and the same as the cup that I washed a week ago (or is it two weeks? The point is, that doesn't matter). This is symmetry under a transformation in time and space . It takes place so automatically that most of us will go through our entire lives without thinking of it at all. There is another, related, trick that the brain does. It makes me "see" the cup as a form . A form is a bunch of "stuff" that is more or less arbitrarily treated as the "same thing". My dog is quite capable of seeing a flying tennis ball as a "thing" that can be snatched out of the air, but she seems to be uninterested in the "things" sh...

\ Quick and dirty definitions, to be clarified as we go along: R Refers to the "real world" . Accepted wisdom is that we have no direct access to R.  It turns out that we actually do have quite a good access to the R domain - the M/R interface, also known as "Science". For the individual, the I domain is tiny compared to the vastness of both M and R. However, with effort and training, it is possible for the individual to open a tiny peephole into R - at least so far as to put to rest the notion that R does not exist at all - that it's all an illusion. M refers to "meme space" or the entire set of ideas, actual and possible. For example, all of Science exists in M, uncomfortably with all religions, past, present and future. It is everything we know, could know, or think we know, possibly including all those things that may be conceivable by some alien intelligence or even "God." M happily accommodates all the wrong ideas and the opposite of ev...