HonoreDB comments on You're in Newcomb's Box - LessWrong

40 Post author: HonoreDB 05 February 2011 08:46PM

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Comment author: wedrifid 01 February 2011 08:37:44AM 11 points [-]

Q: Why does this knife have a handle?
A: This allows you to grasp it without cutting yourself.

These kinds of answers are highly compelling, but strictly speaking they are allowing events in the future to influence events in the past.

No, they aren't. They are answering the question according to the standard meaning conveyed with "Why?". When we use the word 'why' we mean a variety of things along the lines of 'What purpose does this serve?' as well as sometimes 'Explain the series of events that lead up to the final state in a convenient way'.

In standard usage if someone answers 'so you don't cut yourself' they usually are not talking about anything to do with temporal relations one way or the other.

Comment author: HonoreDB 01 February 2011 04:45:18PM 3 points [-]

What I'm arguing is that talk of purpose or design implicitly involves temporal concepts. The purpose of a knife is not ontologically basic; when you point at a purpose you're pointing at a chain of causality involving an optimization process and predictions of future uses of the knife.