Re: How a True(X) predicate can be defined for the set of analytic knowledge

On 3/29/2025 1:28 PM, Richard Damon wrote:

On 3/29/25 10:28 AM, olcott wrote:

On 3/28/2025 4:50 PM, Richard Damon wrote:

On 3/28/25 3:45 PM, olcott wrote:

On 3/28/2025 5:33 AM, joes wrote:

Am Thu, 27 Mar 2025 20:44:28 -0500 schrieb olcott:

On 3/27/2025 6:08 PM, Richard Damon wrote:

On 3/27/25 9:03 AM, olcott wrote:

On 3/27/2025 5:58 AM, Mikko wrote:

On 2025-03-26 18:01:14 +0000, olcott said:

On 3/26/2025 3:36 AM, Mikko wrote:

>

I am NOT referring to what is merely presented as the body of
general knowledge, I am referring to the actual body of general
knowledge. Within this hypothesis it is easy to see that True(X)
would be infallible.

>
In that case your True(X) is uncomputable and any theory that
contains it is incomplete.
>

The body of general knowledge that can be expressed using language is
defined to be complete. The moment that new knowledge that can be
expressed in language comes into existence it is added to the set.
>

No its not. We KNOW there are things we don't know yet, but hope to.
>

As soon as the first person knows new general knowledge and this
knowledge can be written down (unlike the actual direct physical
sensation of smelling a rose)
then this becomes an element of this set of knowledge.
>

And, the base of a logic system is STATIC and fixed.

The set of general knowledge that can be expressed in language has more
flexibility than that.
>

You just don't understand the meaning of the words you are using.
>

True(X) merely tests for membership in this set;
(a) Is X a Basic Fact? Then X is true.

Which makes it not a TRUTH test, but a KNOWLEDGE test, and thus not
names right.

The set of all general knowledge that can be expressed in language is a
subset of all truth and only excludes unknown and unknowable.

>

Exactly, it doesn't include the unknown truths and ought to be called
Known(X). It is also contradictory since it gives NO both for unknowns
and their negation.
>

>
*The key defining aspect of knowledge is that it is true*

>
Which has been the eternal debate, how can we tell if some "fact" we have discovered is true.
>
In FORMAL LOGIC (which you just dismissed) truth has a solid definition, and we can formally PROVE some statements to be true and formally PROVE that some statements are just false, and thus such statements CAN become truely established knowledge. There may also be some statements we have not established yet (and maybe can never establish in the system) which will remain as "unknown". That doesn't mean the statements might not be true or false, just that we don't know the answer yet.
>

>
This can be incoherent unless complete semantics is fully
integrated into the formal system. There is no way that
applying ONLY truth preserving operations to basic facts
can possibly result in undecidability.

 The problem is that your version of "semantics" is just incompatible with "Formal Logic".
 

Not at all. A knowledge ontology inheritance hierarchy has
an unlimited number of Tarski Meta-language levels as types
in a type hierarchy in a single formal system.
--
Copyright 2025 Olcott "Talent hits a target no one else can hit; Genius
hits a target no one else can see." Arthur Schopenhauer