Some detail of issues with the unmoved mover argument are earlier in the thread; Aristotle’s logic basically assumes existence. (This flaw is what leads to the famous barber paradox.) The change in how logic is understood allows a better understanding of contradictions which in turn allows a better understanding of existence which in turn allows the discovery of examples that contradict what Aquinas proposes.
My deepest apologies, Kbachler, but I can no longer stay on the sidelines. The “[in]famous barber paradox” is relative how?
The unmoved mover argument, though, has several flaws:
- Aquinas uses Aristotle’s potentiality argument for motion. This argument is intended to not be temporal (but rather hierarchical), but actual motion by nature is temporal, so the argument is fundamentally not self-consistent. Our concept of an unmoved mover today is fundamentally different (and more robust) than the concept in Aquinas’ time.
This is where you simply do not understand St. Thomas’ argument. St. Thomas is NOT referring to causation-outside-of-time. He is talking about
simultaneous causation in series: the shoulder moving the upper arm, the upper arm moving the lower arm, the lower arm moving the hand, the hand moving the stick, the stick moving the ball (without breaching the constancy of the connection between the stick and the ball). Or, the virtually instantaneous, simultaneous flow of electricity through a TV set that generates picture and sound.
(Have you ever read any commentaries on Aquinas?)
- “Now whatever is in motion is put in motion by another,…”. The mathematics of motion is much superior today than in Aquinas’ time, when it was basically nonexistent. This statement by Aquinas is demonstrably false via mathematics.
This is not one jot different than asserting that a cartoon character can step out of a cartoon to fix physical problems in the real world. Mathematics is in the imagination.
- “But nothing can be reduced from potentiality to actuality, except by something in a state of actuality.” This statement is also demonstrably false via mathematics.
Cartoon character omnipotence.
- “Now it is not possible that the same thing should be at once in actuality and potentiality in the same respect, but only in different respects. For what is actually hot cannot simultaneously be potentially hot; but it is simultaneously potentially cold.” This statement is demonstrably false as it does not allow for degrees of potentiality, and as it does not allow for “strange situations” now known to be normal in the universe. A thing is a wave and a particle at the same time - to Aquinas (and Aristotle) this would be impossible.
Your commentary is false. Of course he would account for degrees of heat. But, at maximum burn, hot is hot, purely and simply. Degrees of heat are irrelevant. As to your second part, I’m not as nice as Betterave: I call them
naked assertions.
- “It is therefore impossible that in the same respect and in the same way a thing should be both mover and moved, i.e. that it should move itself.” This statement is by mathematics and QED examples, demonstrably false.
OK: let’s apply your imaginary mathematics to a billiard ball at rest on a perfectly level billiard table. I would like to
see your mathematics actually get the billiard ball to move itself.
- “Therefore, whatever is in motion must be put in motion by another.” As 5. is false, this conclusion is false.
This conclusion is false. Patently false!
- “But this cannot go on to infinity, because then there would be no first mover, and, consequently, no other mover;” Assumed, but for no reason. There’s no reason why there MUST BE a first mover.
He has proven this in his description of “infinity.”
Functions sometimes extend indefinitely.
“Indefinitely” is similar to “infinity,” but, not quite the same. That is an error of equivocation, on your part.
This also basically creates petitio principii, because at this point he has assumed what he sets out to prove. The reason why he feels he can? “…consequently, no other mover; seeing that subsequent movers move only inasmuch as they are put in motion by the first mover;” So in otherwords, there must be a first mover to put everything in motion because otherwise the subsequent movers wouldn’t be put in motion because the first mover puts them in motion. That’s circular.
How is that “circular?” (BTW: it is not.)
God bless,
jd