I know that. Well, I am not a Thomist. Aquinas created a whole plethora of weird words, and thomists insist that they are āvalidā and āvaluableā. Not for me. There are no concepts which cannot be described by simple, everyday words. Since you are a mathematician, you should now that even complicated looking concepts, like derivatives and integrals or topology, or stochastic non-linear programming can be explained using very simple words.
Of course they can be explained in simple words. But thereās no reason I should have to spell out the whole definition of a manifold every time I refer to one. It is important we be clear on definitions. I did not mention āintrinsic unityā and āextrinsic unityā merely to leave it at that and let the terms speak for themselves, but as a quick note which I would come back later.
The listener might not understand all the details, but he would understand the basic concepts. When a philosopher uses made-up phrases I suspect that he has nothing to say and wishes to hide the fact behind using esoteric phrases.
I am ignorant of this topic, therefore it is false!
To help to create a āplayingā field, first and foremost I am interested in epistemology. How do we gain knowledge, in an objective, repeatable way? Metaphysics is empty navel-gazing without an accompanying epistemology. An example: If someone asserts that there is such a thing as āimmortal soulā, then he is under obligation to define clearly and precisely just what that āimmortal soulā might be. Then he must present an objective epistemological method to find out if an āentity Xā has that soul or not.
And, by the way, āalleged revelationā is not an epistemological method. Appeal to authority is NOT an epistemological method, though it could be used as an epistemological shortcut. But the authority must be able to substantiate what he says without appealing to some other authority.
Faith is not an epistemological method either. Only reason can be used in arguments.
If you think faith and divine revelation are the basis of Thomistic metaphysics, then Iām not sure how I can help. Thomas follows a realist epistemology, or more specifically,
relational realism. If there is something in existence over there (a being), then I can gain real knowledge about it through my experience with it. Furthermore, this knowledge isnāt presumed to apply only to the specimen Iām studying, but to other examples of this this type of being (something which is). If I have a sample of opium, and I study the properties of this opium both in its effect and chemically, I attain knowledge not about just this one sample of opium, but about all opium with the same chemical structure. And certainly such assumptions are not unique to Thomas in the real world. If tests are run on a pharmaceutical product, the knowledge gain from such testing applies to all examples of that pharmaceutical product. If an engineer tests a substanceās tensile strength under certain conditions, there is the underlying assumption that this applies to all other samples of that substance under the same conditions. Otherwise there would be no point to testing, because if this didnāt follow then knowledge gained about one sample couldnāt be applied elsewhere.
Now, I hope I donāt have to do this every time I give an example, but in production there will flaws in a minority. But thatās just the point, thereās a flaw, because thereās some underlying impurity going on that differentiates it. Obviously our knowledge applies to samples in the same condition ā these rare examples of items with flaws doesnāt suddenly make us assume the knowledge gained from limited samples only applies to those samples, and I donāt think you can deny the general principle that we can gain knowledge in this way and apply it to other cases and samples we havenāt directly experienced. You could obviously deny this is the case, that knowledge gained from a sample doesnāt apply to allā¦ but meanwhile everyone will go on acting as if itās true, because it works. It makes the world intelligible. It makes science possible. And just look at all the success weāve had in applying it. Relational realism doesnāt assume we can know all there is about a being, but that we still can learn real knowledge about it through study, and that this knowledge can be applied to other examples.
Metaphysics as defined in classical tradition is the study of being. Not just assuming it as a brute fact or taking it for granted. The word being can mean all that is. A being, referring to a specific that, means that which is. Thomas did not see existence as something in itself, but as an action. A being interacts with whatās around it, not necessarily intentionally, mind. Elements give off burst of energy, movement, react chemically, warp space-time, what have you. They interact with the cosmos and other beings (and by being, again, is anything which is. The moment a being goes from this type of action, this type of presentation of itself, to inaction, itās equivalent to non-existence or non-being. Thus, existing is seen as the first (and ongoing) act of any being.
Letās pause for a second. Why can we say this? Because we can study beings. As established above, we can gain knowledge of opium by studying a sample of opium. We do not assume that just because we havenāt encountered all opium in existence we canāt know the properties of opium in general. We can gain real knowledge, if not exhaustive knowledge, of the nature of being by studying beings. This assumes a principle of similarity between beings, which we can come back to.