L
lmelahn
Guest
Right, but I think that calling it “empty” is misleading, because the electron density is actually greatest right near the nucleus (in the 1s orbital of a hydrogen atom, I mean).I think it’s actually easier to understand by treating the electron as a standing wave. …]
That, however, is not the main thing: however atoms are configured microscopically, they produce the macroscopic phenomenon that we call solidity (or whatever it is—liquidity, gaseousness, plasma, or what have you).
In my opinion, neither one is plain fact. By “plain fact,” I mean what can be known by direct experience. The idea that the gets its matter from the ground is a type of hypothesis, and as it turns out, one that does not hold up to experiment.…] We might think it plain fact that the matter in a tree comes from the ground, but really it comes mainly from the air. The carbon comes directly from converting CO[sub]2[/sub], while the water comes via the ground from rain in the air.
If we were to do an experiment to demonstrate where a plant gets most of its matter (here is a simple protocol, although if you wanted to publish that kind of experiment in a scientific journal, there would have to be better controls), we would still have to base our observations on direct experience: measuring the mass on a scale, reading the dials, making sure the plant is watered, and so on. We can’t escape from our dependence on direct experience.
This is what I mean (and what Aristotle meant) by “plain fact.”
That the plant derives its carbon from the air is a reasonable conclusion based on those plain facts. In retrospect, people were jumping to conclusions when they assumed that the plant got its matter mostly from the soil.
Let us assume for the sake of argument that atoms are mostly empty space. (It really doesn’t matter, for our purposes.) What prevents us from saying that the solidity is real, but simply produced by those electric and magnetic fields?…] for the reason given by Brian Cox, atoms are mainly empty space, …]
From his properly scientific, or pre-scientific theories, I agree. But (as I mentioned to UtUnumSint earlier), the sun rises and sets the same for Aristotle as for us. The difference is that now we know more about the solar system. We cannot, however, escape from that knowledge that is available to us through direct experience.The more we learn, the further away objective reality gets from Aristotle’s naive intuitions.
That is easy: (even setting aside the technical difficulty—if not impossibility—of making such a device) the transporter would know nothing about the difference between Kirk and his boots. But then we are not really expecting it to: it is just a machine. It is sort of like asking whether the digital camera knows the difference between the persons in the photos it takes and the background. Of course, it has no idea (because it has no ideas, ever). But a good programmer can make a program that selects the persons or the faces in a photo. The program works, however, thanks to the programmer’s knowledge, not its own.…] When Kirk tells Scotty to beam him up, how does the matter transporter know what is Kirk the thing? …]
(In any case, if I were programming a transporter, I would want to program it so that the boots—not to mention my other clothes—come with me!

But the sun lacks the intrinsic unity that something like an organism has.Is the Sun just the disc, or does it include the solar wind? How far out? The Sun’s gravity never ends.
Those are his pre-scientific theories, as I mentioned.Aristotle makes blanket assumptions about what he supposes to be plain fact.
Incidentally, I never said that Aristotle is to be followed in all of his ethical conclusions. (He also seems to think that some people are naturally only apt for slavery, for example.) However, a lot of his ethical principles are very much valid: his theory of virtues and vices, for example. We always need to sift through a philosophy (especially a pagan philosophy) and purify it of what is not acceptable.I’m not sure about the ethics, given for instance, …].
This quote from the Summa is an unfortunate, or at least unfortunate-sounding, result of Aristotle’s primitive biology. He thought that generation was basically all done by the father, and that the mother’s role was entirely passive—that the male’s seed functioned like a plant seed, and the mother’s body like the soil. Hence, the male’s body (according to this theory) must be more “developed” than the female’s.
We now know that, if anything, it is the reverse: the female’s body is, if anything, even more marvelous than the male’s, and she certainly is responsible for the lion’s share of the physical “work” of generation. But neither Aquinas nor Aristotle, of course, had the possibility of using endoscopy or ultrasound to verify their theories.
Note that Aquinas absolutely does not assert that woman is inferior to man by nature, and in fact, it is the very concept of nature and substance that makes him affirm their equality in dignity. (To see this, please be sure to read the answer to Objection 1 all the way to the end.) In this, Aquinas made considerable progress over Aristotle.
Substance and nature reveal themselves to us. We really have no trouble telling apart the ones that are most relevant to us: living things, and especially other human beings.More generally, the issue with natures is who gets to decide. More generally still, a lot of interpretation and excusing of known errors always seems to be necessary.