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- From: lizi@soda.berkeley.edu (Cosma Shalizi)
- Newsgroups: sci.philosophy.tech,sci.physics,sci.skeptic
- Subject: Re: Measurement & Precision
- Message-ID: <1dck8fINNgie@agate.berkeley.edu>
- Date: 6 Nov 92 02:11:27 GMT
- References: <1992Nov2.043143.24298@augean.eleceng.adelaide.edu.AU>
- Organization: Campsu Crusade for Cthulhu (Berkeley Tentacle)
- Lines: 37
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- In article <1992Nov2.043143.24298@augean.eleceng.adelaide.edu.AU> dabbott@augean.eleceng.adelaide.edu.AU (Derek Abbott) writes:
- >Imagine you are a stone age philosopher. All you have are your big chunky
- >stone tools to work with to engineer with for everyday life.
- >You produce a persuasive argument that it is impossible to ever produce
- >tools, machines and measurements that are accurate to within micrometers
- >(or fractions of a camel's hair).
- >It is obvious to you that your coarse implements can't measure to any greater
- >accuracy than they are already and so engineering to greater precision
- >is philosophically impossible, by simple inductive reasoning.
- >Where is the flaw in his argument?
- 1. Induction is not valid. This has been known for some time. There are
- many inductive arguments which are rational - the fact that all observed
- crows have been black _is_ reason to believe that all crows are black -
- but not valid, the way, "All men are mortal, and Socrates is a man,
- therefore Socrates is mortal" is valid.
- 2. This is not a philosophical argument but an engineering one. "With our
- current technology, it is impossible to make things finer than a
- camel's hair, and we can think of no ways of improving things to get
- around this limitation." This is a very sound argument. With stone age
- techniques and science, there is no way to make tools or measurements
- of the desired accuracy.
- >I'm wondering to what extent we are tricking ourselves with words
- >(like the stone age man example did) today when we grapple with such
- >philosophical mysteries as quantum mechanics, mind-body problem,
- >determinism v. free will etc.
- I have yet to see arguments - serious, competent arguments - advanced on
- those problems that depended on the state of our engineering. Certainly this
- is not the problem with quantum mechanics. In brief: No - not like your
- stone age philosopher was.
- P.S. See Ch. 4 of _The Plato Cult_ in re pseudo-questions, Derek.
-
- Cosma Rohilla Shalizi
- In Real Life: lizi@ocf or lizi@soda .berkeley.edu
- larval physicist
- --
- "What's the use of being an American citizen if I can't swear when I
- damn well want to?" - My mother, while waiting in line in Heathrow
-