Hard to Vary or Hardly Usable?
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With an account, you can revise, criticize, and comment on ideas.My critique of David Deutsch’s The Beginning of Infinity as a programmer. In short, his ‘hard to vary’ criterion at the core of his epistemology is fatally underspecified and impossible to apply.
Deutsch says that one should adopt explanations based on how hard they are to change without impacting their ability to explain what they claim to explain. The hardest-to-change explanation is the best and should be adopted. But he doesn’t say how to figure out which is hardest to change.
A decision-making method is a computational task. He says you haven’t understood a computational task if you can’t program it. He can’t program the steps for finding out how ‘hard to vary’ an explanation is, if only because those steps are underspecified. There are too many open questions.
So by his own yardstick, he hasn’t understood his epistemology.
You will find that and many more criticisms here: https://blog.dennishackethal.com/posts/hard-to-vary-or-hardly-usable
Neil Hudson asks, “Why should HTV- or rationality generally - be required to supply” an algorithmic ranking?
I reply:
Because it’s better for error correction. If you want your life to be a beginning of infinity, if you want to make sustained progress, you need to be rational. To be rational, you need to be able to tell when you’re being irrational. So you need a criterion of rationality. The more inputs it works for, the better. Universal is best.
I reply:
Rational decision-making (involving HTV or not) is a computational task. We can’t claim to have understood such a task unless we’ve programmed it.
I reply:
The task would actually be *harder* to program if we constrained it to work only for some ideas and not others.
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