[hist-analytic] Now Available: Elizabeth Anscombe's INTENTION!
Roger Bishop Jones
rbj at rbjones.com
Mon May 31 02:30:37 EDT 2010
On Friday 28 May 2010 12:28, Baynesr at comcast.net wrote:
> Compare using a meter stick as supplying a standard unit
> measure and the idea of rotation in defining a degree as
> 1/360th of a rotation. Note that 'one rotation' is a
> constant; something that doesn't depend on any
> particular circle, whereas a meter stick is a
The difference may be explained by dimensional analysis in
which all physical quantities are assigned a dimension which
is some combination of mass, length, time, electric charge,
and temperature, (denoted M, L, T, Q, and Θ, respectively)
(from the wikipedia).
Length is one of these primitive dimensions of physical
quantity, but I think the degree is a dimensionless pure
ratio, i.e. not a physical quantity at all, closely related
to pi (there are 2pi radians in a circle).
> This asymmetry is part of what is behind
> some of my discussion of the contingent a priori etc.
Is this in the Anscombe book, or elsewhere?
As you know I regard the contingent a priori as one of
Speranza's beloved vacuous concepts, in default of
pathological interpretations of the terms involved.
I would be happy to spice up hist-analytic with a debate on
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