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- From: geb@cs.pitt.edu (Gordon Banks)
- Newsgroups: sci.med
- Subject: Re: Bashing, truth, etc.
- Message-ID: <17942@pitt.UUCP>
- Date: 31 Dec 92 18:31:17 GMT
- Article-I.D.: pitt.17942
- References: <1992Dec21.171109.2975@cnsvax.uwec.edu> <Bzo4A6.uE@mentor.cc.purdue.edu>
- Sender: news@cs.pitt.edu
- Reply-To: geb@cs.pitt.edu (Gordon Banks)
- Organization: Univ. of Pittsburgh Computer Science
- Lines: 30
-
- In article <Bzo4A6.uE@mentor.cc.purdue.edu> hrubin@pop.stat.purdue.edu (Herman Rubin) writes:
- >>>I do not need any data whatever to know that saccharin has an effect on
- >>>cancer rates, or that vitamin C has an effect on longevity, or even that
- >>>the most disreputable quack treatments have an effect.
- >
- >>is not exactly what the rest of us would consider consistent with
- >>scientific medicine. If these statements are true, it should be
- >>possible to design studies to prove them true. If the beneficial effect
- >>of some treatment is unmeasurable, then its utility is negligible.
- >
- >Read the statements more carefully. I said that I do not need any data
- >to show that it has an effect. This means that the effect is not
- >EXACTLY zero. This statement says nothing about the magnitude of
- >the effect.
-
- No, you need data to "show that it has an effect". It could very well
- be zero, and although you may suppose it isn't, without data you can't
- show that. As long as it is close enough to zero that you can't
- discover which direction it lies, we are justified in the position
- that the effect is zero. What's more, it could well be exactly
- zero. Do you really believe that whether or not you get up from
- your desk and go get a drink of water in the next five minutes
- has a systematic effect on your life-span? Sure you could encounter
- a murderer at the drinking fountain, but if you stayed at your
- terminal a meteor could crash through the roof killing you.
- --
- ----------------------------------------------------------------------------
- Gordon Banks N3JXP | "I have given you an argument; I am not obliged
- geb@cadre.dsl.pitt.edu | to supply you with an understanding." -S.Johnson
- ----------------------------------------------------------------------------
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