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- Xref: sparky sci.philosophy.tech:3943 sci.physics:18370 sci.skeptic:19163
- Newsgroups: talk.philospohy.misc,sci.philosophy.tech,sci.physics,sci.skeptic
- Path: sparky!uunet!rosevax!aquarius!grante
- From: grante@aquarius.rosemount.com (Grant Edwards)
- Subject: Re: Measurement & Precision
- Message-ID: <1992Nov7.180042.18845@rosevax.rosemount.com>
- Sender: news@rosevax.rosemount.com (USENET News administrator)
- Nntp-Posting-Host: aquarius
- Reply-To: grante@aquarius.rosemount.com (Grant Edwards)
- Organization: Rosemount, Inc.
- References: <1992Nov2.043143.24298@augean.eleceng.adelaide.edu.AU>
- Date: Sat, 7 Nov 1992 18:00:42 GMT
- Lines: 51
-
- 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.
-
- First, Philosopher's should abstain from making engineering decisions
- without any experience or education upon which to base such decisions.
-
- : 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).
-
- And while you are producing persuasive arguments to the contrary,
- other people are out actually doing it.
-
- : 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.
-
- It may be obvious to you, but it's pure bullshit.
-
- It's possible to measure and reproduce items accurate to within 100
- microns using very primitive techniques. Place two cubes against each
- other and run you finger back and forth across the joint. It's
- possible to judge to within 20 or 30 microns which is larger.
-
- If it's still too big, you get out the water and rouge and grind away
- at it for another hour or two. Talk to somebody who's ground their
- own mirrors for a telescope -- a remarkably primitive but effective
- process.
-
- It's possible to determine if the corners of a large building are
- level with nothing more than trenches in the ground and a few barrels
- of water.
-
- It's possible to layout an exact square with nothing more than a piece
- of string.
-
- People are patient and clever, Derek. With a few thousand year's
- worth of hard work they can accomplish quite a bit.
-
- You have made the same mistake as do the "aliens built the pyramids"
- crowd. You have seriously underestimated the persistence and
- resourcefulness of H. sapiens.
-
- --
- Grant Edwards |Yow! I just forgot my whole
- Rosemount Inc. |philosophy of life!!!
- |
- grante@aquarius.rosemount.com |
-