Hi,
In the second paragraph of the physics and sensations section
of my paper the origin of physical laws and sensations I made
a rather stupid error (what a shame!).
Indeed I say Note that neither G nor G* does prove it
[where it is for Bp - -B-p]. This is ridiculous, because
G* proves Bp-p, for
Hi Jacques,
Nice to see you back. Actually I just discovered your message
in the archive, I did not got them by the mail (?). Sorry for the delay.
I quote you from the archive:
The axiom B(Bp-p)-Bp seems very strange to me.
I think it *is* strange. It is at the heart of counter-intuition in the
The curious and amusing thing is that in FU, Smullyan
call that error the beginners error (page 46).
It consists in believing that the formula (a- -b) (a - b) is
a contradiction, where actually the formula is true in case a is false.
A simpler example is (p- -p). This is true for p false.
What is
I once saw a quote attributed to Niels Bohr to the effect that an expert is
a person who has made all the mistakes its possible to make in a narrow
field of endeavor.
Hal
At 07:11 AM 9/24/2004, you wrote:
The curious and amusing thing is that in FU, Smullyan
call that error the beginners error
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