ONT Boundary/Interior =?= Synthetic/Analytic
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Let's go back to Quine's topological metaphor:
the "web of belief", "fabric of knowledge",
or "epistemological field theory" picture,
and see if we can extract something that
might be useful in our present task,
settling on a robust archtecture
for generic knowledge bases.
| 6. Empiricism without the Dogmas
|
| The totality of our so-called knowledge or beliefs, from the most
| casual matters of geography and history to the profoundest laws of
| atomic physics or even of pure mathematics and logic, is a man-made
| fabric which impinges on experience only along the edges. Or, to
| change the figure, total science is like a field of force whose
| boundary conditions are experience. A conflict with experience at
| the periphery occasions readjustments in the interior of the field.
| Truth values have to be redistributed over some of our statements.
| Re-evaluation of some statements entails re-evaluation of others,
| because of their logical interconnections -- the logical laws
| being in turn simply certain further statements of the system,
| certain further elements of the field. Having re-evaluated one
| statement we must re-evaluate some others, which may be statements
| logically connected with the first or may be the statements of logical
| connections themselves. But the total field is so underdetermined by
| its boundary conditions, experience, that there is much latitude of
| choice as to what statements to re-evaluate in the light of any
| single contrary experience. No particular experiences are
| linked with any particular statements in the interior of
| the field, except indirectly through considerations
| of equilibrium affecting the field as a whole.
|
| Quine, "Two Dogmas", pp. 42-43.
|
| W.V. Quine,
|"Two Dogmas of Empiricism", 'Philosophical Review', January 1951.
| Reprinted as pages 20-46 in 'From a Logical Point of View',
| 2nd edition, Harvard University Press, Cambridge, MA, 1980.
|
| http://suo.ieee.org/ontology/msg04935.html
There are some things that I am not trying to do.
One of them is reducing natural language to math,
and another is reducing math to natural language.
So I tend to regard the usual sorts of examples,
Bachelors and Hesperus and Phosphorus and so on,
as being useful for stock illustrations only so
long as nobody imagines that all we do with our
natural languages can really be ruled that way.
The semantics of natural language is more like
the semantics of music, and it would take many
octaves of 8-track tapes just to keep track of
all the meaning that is being layered into it.
So let me resort to a mathematical example, where Frege really lived,
and where all of this formal semantics stuff really has Frege's ghost
of a chance of actually making sense someday, if hardly come what may.
There is a "clear" distinction between equations like 2 = 0 and x = x,
that are called "noncontingent equations", because they have constant
truth values for all values of whatever variables they may have, and
equations like x^2 + 1 = 0, that are called "contingent equations",
because they are have different truth values for different values
of their variables.
But wait a minute, you or somebody says, the equation x^2 + 1 = 0 is false
for all values of its variables, and of course I remind you that it does
have solutions in the complex domain C. So models of numbers really
are as fleeting as models of cars. And this explains the annoying
habit that mathematicians have of constantly indexing formulas
with the names of the mathematical domains over which they
are intended to be interpreted as having their values.
And then someone else reminds us that 2 = 0 is true mod 2.
Those are the types of examples that I would like to keep in mind when we examime
the relativity of the analytic/synthetic distinction, or, to put a finer point on
this slippery slope, the contingency of the noncontingent/contingent distinction.
Jon Awbrey
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