On 6/2/2016 9:50 AM, Bruno Marchal wrote:
On 01 Jun 2016, at 21:05, Brent Meeker wrote:
On 6/1/2016 5:03 AM, Bruno Marchal wrote:
In fact my definition of rational belief is very simple: a machine
beliefs p if she asserts p. Then I limit myself to rational
believers because it would be nonsense to interview a non rational
machine to derive rationally, following the UDA prescription, the
correct physics or the correct theology.
But what does "rational" mean? I think you mean "proves all valid
theorems from some set of axioms", which is not what it means when
applied to humans.
It means: does not deny the consequences of its/her/his beliefs.
Does that mean a rational person must know all the consequences of their
beliefs? Does one's belief have consequences if one never acts on it?
Or do you mean "consequence" = "logically entailed proposition"?
I'd say a rational person is one who can give coherent reasons for their
beliefs.
Brent
Brent
Note that correct beliefs does NOT mean knowledge (in the sense of
the machine). The machine is not aware, and never will, that her
beliefs are in general correct. Knowledge, contrarily is correct *by
definition*, as it is formally defined, at the necessary meta-level,
by correct-beliefs. This is a subtle but extremely important point
made possible only thanks to incompleteness. (For those who have the
book by Gerson on Antic Epistemology, that is the precise point
where Gerson critics of the Theatetus" definition of knowledge get
wrong: it is the difference between a belief which happen to be
correct, and a belief restricted (non constructively) to correct
proposition).
The goal is to derive physics and theology, not human psychology.
Bruno
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