On 17 Mar 2013, at 00:38, Michael Norrish <[email protected]> wrote:

> The HOL4 Description manual has a section on the simplifier.  And yes, it 
> should preserve the probability of goals because at the top level, it is only 
> capable of replacing equals with equals. 
> 

I am not convinced. I often set up a goal that I rate as highly probable, but 
when I rewrite it to 1 = 2 or suchlike, the probability takes a dive. That 
replacing equals with equals preserves provability, I believe. :-)

Regards,

Rob.
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