So pardon my cynical twist, but what are you doing with that 20,000×20,000 double-precision floating point matrix you say you need to invert today? I… - Erik Naggum

They are not identical. The aspects you are willing to ignore are more important than the aspects you are willing to accept. Robbery is not just another way of making a living, rape is not just another way of satisfying basic human needs, torture is not just another way of interrogation. And XML is not just another way of writing S-exps. There are some things in life that you do not do if you want to be a moral being and feel proud of what you have accomplished.

The theory is the result of listening to the problem. When the theory acquires a life of its own because some people like it more than the real world, all kinds of uninspiring, uninteresting things happen, so the key is both to listen to the problem and to study the theory. But always remember that just as much theory is bunk as there are buggy solutions. There is nothing more wrong with "theory" than "solutions" – both their quality and their applicability are orthogonal to their existence.

The fundamental deficiency in HTML is that it reduces hypertext and the intertwinedness of human communication to a question of how it is rendered and what happens when you click on it. … HTML is to the browser what PostScript is to the laser printer.