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- Path: sparky!uunet!pipex!ibmpcug!mantis!news
- From: Jeffrey D Koperski <jkopersk@magnus.acs.ohio-state.edu>
- Newsgroups: alt.atheism.moderated
- Subject: RE: FAQ, 2/2
- Message-ID: <1992Dec22.175654.17433@magnus.acs.ohio-state.edu>
- Date: Tue, 22 Dec 1992 17:56:54 GMT
- Sender: atheism@mantis.co.uk
- Distribution: world
- Organization: The Ohio State University
- Approved: atheism@mantis.co.uk
- Lines: 92
-
- Jeff:
- >>First, any good scientist
- >>believes in the existence of entities that are undetectable.
- >
- Reply:
- >Wrong. Any theory that a scientist constructs about entities that are not
- >directly observable is based (ultimately) upon entities that *are* observable
- >and understood.
-
- If these constructed entities are essentially undetectable and
- yet exist, then you have granted all I want. The FAQ rules
- essentially undetectable entities to be non-existent. My claim
- is simply that scientists also believe in such entities. I care
- not how they arrive at these existential claims.
-
- >>That is, no one
- >>holds that the only things that exist are objects within Earth's light-cone.
- >
- >If no one holds this, why are you bringing it up? Do you hold otherwise? If
- >so, I (and any scientist) would ask for evidence and reasons why matter does
- >not exist outside Earth's light cone. The onus of proof would be on you to
- >prove the assertion.
-
- I think you simply missed my point. Also, one of the other
- responses to my original post seems to be making this very claim:
- all and only those things that enter Earth's light-cone exist.
- I'm trying to show this is not the majority view.
-
- >>Objects outside the cone as well as, say, whatever is inside a black-hole, are
- >>not dectectable, yet we ascribe existence to them.
- >
- >What "we"? If you have no information about these entities, you cannot make
- >statements about them (statements that you would assert as "fact"). Since
- >knowledge is contextual and hierarchical, you could construct a theory about
- >such entities based on what you have observed "within Earth's light-cone".
- >But you would be mistaken to construct a theory that is not consistent with
- >your existing knowledge.
-
- I'm not sure we have an argument here other than to say
- scientists do make existence claims about things inside a black
- hole. The original theory that gave us black holes predicts what
- is inside them, which is identical to that thing which causes
- them, viz., highly dense neutron stars.
-
- >>Second, numbers, sets, and a host of universals are undetectable when
- >>uninstantiated, but many philosophers and most mathematicians believe in the
- >>existence of (at least) some mathematical entities (see, for example, Roger
- >>Penrose, _The Emporer's New Mind_).
- >
- >You are impeaching existence by attacking the only means we have of
- >understanding existence, our conceptual faculty (and mathematics is
- >essentially a conceptual science). A "set" or a "universal" (such as
- >"man") is a construct of the human conceptual process. By observing many
- >"men" we build a concept of "man". The universal "man" is not an existent,
- >but is an abstraction of a set of existents.
-
- Interesting. Just to put you on the philosophical map, you
- espouse here an intuitionist philosophy of mathematics and
- a nominalist approach to universals (although 'abstraction' can
- mean many things). That is fine. The point is that
- realism/platonism is the majority view among mathematicians,
- including Penrose. They claim that mathematical entities exist
- tout court. In fact, W.V. Quine, an arch empiricist and
- the top philosopher in the world today, believes in the existence
- of one abstract object: sets. I don't care to critique your
- personal metaphysical views. My point here is that the majority
- of philosophers, mathematicians, logicians, and physicists do not
- share your strict empiricism, not even those who are considered
- very severe in the regard. If you're interested (and from
- your next remark you are probably not but others might be), a
- contemporary philosopher who defends such a view is Bas van
- Fraassen in _The Scientific Image_. As a footnote, this is van
- Fraassen's most important work to date. Interestingly enough, he
- became a Christian after writing it--evidence that even a very
- strict empiricism is not in conflict with theism.
-
- >>A short review of 20th century philosophy will show that attempts to rule out
- >>theological discourse as "non-cognitive" (Carnap's term) or otherwise
- >>essentially flawed have always come back to haunt science. That is, applying
- >>the same criterion to the "good discourse" of theoretical science rules out
- >>part of that discourse.
- >
- >It's not surprising that 20th century philsophers have been unable to
- >accomplish the obvious (the FAQ would call this comment argumententum ad
- >hominem).
-
- There are a number of therapeutic replies I could make here, but
- I'll refrain.
-
- Jeff Koperski
- Dept. of Philosophy
- Ohio State
-