On 9 February 2008 Paul Brandon wrote:
>[...]  My bug is the idea that Einstein in 
>some sense *refuted* Newton rather than extending his model.
>While the conceptual (verbal) aspect is quite different, the 
>mathematics (as I understand it) are an extension rather than a 'from 
>the ground up' rebuilding.

Paul: I don't know if you're making a general (and valid) point, or
specifically referring to what I wrote, when you object to Einstein's being
said to have "refuted" Newton. Anyway, to make my position clear, I didn't
say that Einstein refuted Newton, I suggested that the *circularity of
science argument* was refuted by Einstein's producing relativity theory.

But - I wouldn't say Einstein "extended" Newton's model, since his theories
of special and general relativity produced kinematic and gravitational
equations based on a radically different foundation. Perhaps "improved
upon" may be a preferable way of expressing it.

> While the conceptual (verbal) aspect is quite different, the 
> mathematics (as I understand it) are an extension rather than a 'from 
> the ground up' rebuilding.

I'm not sure the mathematics enters the issue. It is a tool, rather than
the theory itself. (Which is, I think, roughly what Tim Shearon argued on
this point.)

Chris Green wrote:
> I am as confused as many others are by this "parable." My own reading of 
> it is that our own actions (firing the canon) serve to
create/construct/configure
> the very "nature" (the clock at the clock shop) that we are looking at.
And,
> thus, in essence we see our own "reflection" rather than an independent
nature.

As Chris well knows, this is an ancient issue that I think I'll leave to
the philosophers, before I get even more out of my depth. 

Allen Esterson
Former lecturer, Science Department
Southwark College, London
http://www.esterson.org

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