[tomcatfish]

> However, by “system” I mean, roughly, a set of rules that can be printed in a book weighing less than ten kilograms, and which a person can consciously follow.

Is this tongue in cheek or is it a very strange thing to say? That's definitely not a statement that should be made with no justification. I can guess what the author meant, but I don't really want to guess at basics of their argument.

[tlb]

It's important to exclude infinite books, which could just contain a lookup table for every possible situation rather than any general rules. And also finite but exponentially large books, which could contain a lookup table for every possible image (and be something like 2^(1024x768x24) pages long.)