| | (Regi, sorry for the delay.)
[Regi:] "Everything that exists has a specific nature."
[Jaume:] "Sure. Still, identical things have something identical. And that was the core of my question."
[Regi:] "Again, I think you are confusing existents with their attributes, qualities, or properties. No two existents are identical. If two existents have exactly the same qualities in every way, they are not two, they are the same existent. Everything that exists must be differentiated in some way from everything else that exists, which means, it must have some quality or attribute that differentiates it from all other existents. (Relative qualities are real qualities by the way, so that existents like atoms, which are identical in every other way are still differentiated by their positional qualities.)"
Related to the strict materiality, we (of course) agree. Platonism is a sort of naďveté. But with your circumloque you still allow the possibility that two different non-material existents may have --at least-- one common feature.
"As we discover aspects of the nature of things, we call that discovered knowledge ‘laws,’ but it is never absolutely complete, and often has inaccuracies."
"Under your view, is 1+1=2 is not complete? and is inaccurate?"
"Under my view," 1+1=2 is not an aspect of the nature of things, which having been discovered we call a law. 1+1=2 does not describe any attribute of any existent."
Again, (I asume) you are strictly referring to materiality.
Universals are fearures of reality that are not material. Though you can form concepts from universals, they are not concepts itself, because no one invented them, and they will be valid for ever.
"1+1=2" obviously doesn't describe the material part of any existent, but, as I said in another article discusion, allows us to predict the result of a the sum of two material units before empirically proving their material existence, and even sometimes before their material existence.
"The facts mathematics enable us to understand are only relationships."
"Only"?
Mathematics (and logic) allow us to predict certain relationships between material existents, before seeing, touching, measuring them.. as I said before (and excuse me for the self-citation),
\c{I can predict the result of a sum I never have "seen" before, i.e., as a sum of apples, or of pencils, etc. To predict the result of the material sum of apples, I apply certain previously known rules. Maybe I have never seen those apples, maybe I have never imagined that exact number of apples, but anyway I predicted the result. [Discussion of Russell Madden's article "You Might Be a Fascist".]}
Isn't that prediction something not-strictly-material?
"My point is that (real) science, (real) philosophy, and (real) knowledge are not subject to change. Or is perhaps the result of 1+1 subject to change? And why should it be different in reference to less "obvious" patterns of reality?"
"By "subject to change," I [d]o not mean those facts we have established can change, but the fact that we can never know everything, and we know some things only approximately. Therefore, we are always adding new knowledge, and refining our approximations."
And what about the something we know exactly? Could you tell me how I know the amount of apples I will have in a basket with one apple when you add one apple into it, when I never have seen those apples before?
"For example, we have a pretty good idea how far the sun is from the earth, but these kinds of measurements are always approximations, in that we must say, the earth is x + or - y distance from the earth."
We know --from astronomy-- that the distance from the Sun to the Earth is not a constant, but will be changing over time.
"I think what you are saying is that the sun is some exact distance from the earth, which we cannot exactly determine, and it is that exact distance that must be known before the science of that measurement is really science."
Regi, I am not saying that. That's not a universal. Some mathematics and logic laws we use to measure that distance are concepts of universals.
"There is not some "thing" redness that is "in" both the apple and the book."
Then, how you are able to grasp the same "perceptual quality red" (albeit in different "degree")?
"To be the same thing, the apple and the book would have to be the same thing."
Still, without being identical, the apple and the book share some identical feature; otherwise you hadn't used an identical word "red" to describe their color. For avoiding to see a problem in identifying the same "red" in different particular material existents, you simply need to consider the feature "redness" as an unmaterial reality (somehow) related to material reality. The concept "redness", unavoidably, refers to a real existent we could name "redness", being this real referent arguably unmaterial.
"In fact we know the grey, is the same qualities as the red and blue, differently perceived. How can the same universal, grey, also be different universals, red and blue? There are no universals."
I think (and your arguments play in favour of my view) that if universals don't exist, concepts --here you may take "red" or "grey"-- are unfounded. Personal limitations delay --or avoid-- our awareness on them, but we take (implicitly or explicitly) universals for granted. Color-blind people, too.
When somebody sustains that universals don't exist, that one reduces life to the level of an unfounded hypothesis.
Give me an example of 1+1 equalling 2 independent of a knower.
I go to the grocery store and I bring a bag there, which contains an apple, with me unaware of that. I put then a grocery store's apple into one of the lateral pockets of that bag, and go to the checkout counter.
The number of apples I have then in my bag is independent of my "apple-in-the-bag" awareness and, when I empty there the bag in order to pay the sum, the total number of apples i had in my bag can certainly bring me some problems.
"If all you mean by a, "universal," is something that is always "universally" true, that would be fine, but the term would be superfluous."
Whether you find them "fine" or not, it really don't bother my philosophical view. But I can't find them "superfluous", because without them I could not explain the existence of certainty.
Regards,
Jaume
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