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- Newsgroups: sci.philosophy.tech
- Path: sparky!uunet!secapl!Cookie!frank
- From: frank@Cookie.secapl.com (Frank Adams)
- Subject: Re: Assumptions vs. assertions (was: Re the Cosmological Bad Dream)
- Message-ID: <1992Nov09.231923.46959@Cookie.secapl.com>
- Date: Mon, 09 Nov 1992 23:19:23 GMT
- References: <1992Oct22.031124.44051@kuhub.cc.ukans.edu> <1992Oct26.215238.102458@Cookie.secapl.com> <1992Nov1.082333.44291@kuhub.cc.ukans.edu>
- Organization: Security APL, Inc.
- Lines: 60
-
- In article <1992Nov1.082333.44291@kuhub.cc.ukans.edu> miner@kuhub.cc.ukans.edu writes:
- >In article <1992Oct26.215238.102458@Cookie.secapl.com>, frank@Cookie.secapl.com (Frank Adams) writes:
- >
- >[most of earlier discussion with up to four embeddings deleted for
- >convenience]
- >
- >Miner:
- >>>>>The field I know best is Linguistics. In this field, we make the
- >>>>>following assumption:
- >>>>>
- >>>>> (a) All of the languages ever spoken have had the same properties
- >>>>> as languages we have examined.
- >
- >[...]
- >
- >Miner:
- >>>My examples of
- >>>scientific assumptions have to be in statement form, because I have
- >>>to talk about truth. That is, I need to be able to be clear about
- >>>what the propositional content of the assumption is.
- >
- >[...]
- >
- >Adams:
- >> I wonder if your (a) is really most accurately presented in statement form.
- >> There are, after all, some good reasons for thinking it *isn't* actually
- >> true; and, as you note, even those who state it may not really believe.
- >> I would like to seriously suggest that an imperative formulation of (a)
- >> might more accurately represent it. For example,
- >>
- >> (a') Don't assume that languages we can study from the past have different
- >> properties from those of languages we have examined.
- >>
- >> It seems to me that a speaker who does *not* actually believe in (a) but
- >> says it anyhow must really have an interpretation like (a') in mind.
- >[...]
- >Secondly, isn't it really deontic modality you are gravitating toward
- >here? In other words, in the end aren't you really going to end up
- >saying that scientific assumptions are of the form "One ought (not) to do
- >X"? If so, it might be best to short-circuit the excursion through
- >directives and go right to the question of seeing these things as part
- >of the hoary old problem of getting an "ought" from an "is" (or at
- >least dealing with "oughts").
-
- Yes, I think you're right.
-
- At that point, the derivation of (a) doesn't seem to me to be very
- mysterious. We aren't really going from an "is" to an "ought". There is a
- pre-existing "ought":
-
- (c) One ought to do what one can to further the science of Linguistics.
-
- (c) is rather obviously aimed at linguists, as (a) is. And the derivation
- of (a) from (c) has already been stated: not assuming (a) produces useless
- theories.
-
- And (a) is still in some sense "falsifiable": the arguments that led us to
- (a) from (c) depend on other things about our state of knowledge. If we can
- come up with an information source/methodology for dealing with changes in
- the fundamental structure of language, (a) will no longer be good advice.
-