Oxyaena wrote:
> Thomas Aquinas famously compiled in his magnum opus *Summa Theologica* a
> list of "proofs" that he thought conclusively proved the existence of
> God, not just any deity, but the Abrahamic God. Here I refute each and
> every "proof" he has offered. Let's begin:
Couple of problems with that I'd say. First, Aquinas is much more
careful himself when he describes the status of the arguments. They are
most certainly not proofs as it was understood then, as an deductively
valid inference from self-evident axioms only - and he says in
particular that our finite mind could not possible have this type of
self-evident insight ("Sed contra, nullus potest cogitare oppositum...,
!, Question 2, Article 1)
Rather, what they do is to explore the consequences of the then widely
shared Aristotelian worldview, and shows that is is at the very least
consistent with the existence of a single creator deity. It won't
convince anyone who does not accept already these premises, nor does it
tries to.
And no, the four arguments are not offered as in support of the
Christian deity specifically. The 5 ways are in the first part of the
first Book of the Summa, the Christian specific bits are only in the
third.
>
> 1) Argument from Design
>
> This is one that has been refuted time and time again,
Arguably, but it is a bit odd to mention it when discussing one of the
first to make it that explicit. The refutations came rather later.
Also, are you following here the Summa in your order of things? The fist
argument in the Summa is the unmoved mover, and I'm not sure where you
see an argument form design either here or elsewhere in the Summa.
that since the
> world shows signs of design, then the world must've been designed. This
> has cropped up innumerable times throughout the centuries, including
> with William Paley's "divine watchmaker" mumbo jumbo, or the recent sham
> of "Intelligent Design". One of the main problems with this is that
> design doesn't necessarily indicate a designer, and the design of every
> single organism on this planet, and the components of said organisms,
> down to the molecular level, can be accounted for by evolution.
> Evolution by natural selection is responsible for the bewildering
> variety of organisms we find on this planet today, and that's leaving
> alone such things as inanimate objects, elements, and the origins of
> life itself, all of which we can reasonably say didn't involve any
> divine intervention.
>
> 2) Argument from the first mover
>
> Here Aquinas argues that God is the uncaused cause, by arguing that a
> series of infinite regresses is impossible, he says that something or
> someone must've been the cause for the existence of the universe, and
> that someone is God. Of course there's no reason why that first mover
> couldn't have been named Dumbo the Elephant, but he insists that the
> Abrahamic God is the first mover.
cite please.
Aquinas is essentially committing the
> logical fallacy of special pleading in this one, and there's no reason
> to presuppose that the first mover was conscious or even alive, let
> alone of a supernatural derivation, so why couldn't the first mover be
> of natural origin? Aquinas never provides a satisfactory answer to this
> question.
>
> 3) The Kalam Cosmological argument
>
> Here Aquinas is essentially rehashing the previous "Argument from
> design".
You mean the argument from an unmoved mover? Not quite, though they are
similar. As I said above, the main purpose of the ST here is to show how
Aristotelian world-view is not just consistent with theism, but leads to
it. Aristotle distinguishes different forms of causality, and Aquinas
simply works through them. So together the two arguments take the form:
There are five and only five causal relation between things, as per
Aristotle. The first leads to a single starting point like this, and the
second leads to a single starting point like that - so whatever way you
reason, you and up with a single starting point. Intuitively, the first
deals with the way objects change (I once had hair, now I I'm bald), the
second with causation between two different object (I turned our garage
into a bedroom)
Gross simplification mind, and one could argue against Aristotle here
that this might be a distinction without a difference, but from Aquinas
perspective bot arguments are necessary - if only the first type of
causation lead to a single starting point, then the toehr chain might
offer an alternative not affects by this
The universe is in existence, and since everything in existence
> must've had a cause for existing in the first place, that cause is God.
> Here he is again committing the fallacy of special pleading, and as
> mentioned above there's no reason to presuppose that the original cause
> of the universe was supernatural, or even sentient.
>
> 4) Argument from contingency
>
> Aquinas says that the universe doesn't have to exist, but it does exist,
> so therefore its existence is contingent on something. A la another
> variant of the previous four fallacious "arguments" he's already used.
> It goes without saying that the "contingency" necessary for the universe
> to exist in the first place, according to Aquinas, is the Abrahamic God,
> but once again there's no reason to assume that contingency is the
> Abrahamic God beyond special pleading.
No, that really has little to do with what Aquinas argues. First, there
is nowhere in that argument a reference to the Abrahamic god- as with
the others, the aim is a consistency test together with a conceptual
explanation: We call God the the of entity that...." which you find
explicitly at the end of each demonstration.
As to the argument from contingency itself, it is rather more
interesting for TO purposes, as in a way was seen as a major obstacle by
several Darwin precursors, and in some respects Darwin too. It is a
probabilistic argument closely related to the Doomsday argument: If
everything is possible, then giving enough time, everything should
happen - including the extinction of everything. But what we observe is
that a) things exists and b) not everything exists. So there must be
some other constraint.
As I said, some Darwin precursors faced the same problem - if new
species come into being in a purely random process, we should expect
lots of "weird" things that can't be classified neatly. The additional
constraint, in this case, is of course natural selection as a
stabilizing force. But that took some discovering. The argument from
contingency simply gives reasons why a purely random universe does not
fit with the observations, and in particular in this way also supports
the previous arguments (which assume ordered causality).
> 5) Argument from Teleology
>
> Yet another rehashing of the old "Argument from Design" chestnut. Here
> he's saying that unintelligent objects can't move without being directed
> to do so, and that director is the Abrahamic God according to Aquinas.
Erm, no, again. Again no reference to the Abrahamic god. And also not a
Paleyan design argument. According to Aristotle, everything that happens
can also be described as following a "final cause", it's destiny if you
like, or something that follows from its nature. Stones e.g. fall to the
ground because that;s where they ought to be, according to their nature.
Since only intelligent beings are known to come up with purposes, and we
did not give stones etc their purposes, some other intelligence must have.
This argument does not say things look designed, and in particular does
not talk like Paley about intricate parts etc etc. One advantage that
has is that unlike with Paley's design argument, it does not follow that
there are lots of undesigend things (Paley's pebble on the beach) which
would be an issue for many theists. Rather, everything has a "final
cause" or purpose, and that must come from somewhere. In a more modern
form, it is similar to an argument that says: laws are made by
intelligent beings that express a desired end state (like criminal law)
nature obeys laws, therefore an intelligence must have made them.
> Once again I have to point out there's no reason to assume that the
> original cause was the Abrahamic God, and there's plenty of reason to
> assume that the original cause was natural in origin
At the time when Aquinas was writing? You realize, don't you, that that
was quite some time ago?
rather than
> supernatural, so he once again commits the fallacy of special pleading.
>
> Of course all Thomas Aquinas "proved" was at best the existence of a
> deist god, assuming that a deity at all was responsible for the creation
> and existence of the universe. A simple rebuttal to his fallacious
> baloney is Occam's Razor, that the argument that the Abrahamic God was
> responsible for the existence of the universe is less parsimonious than
> a naturalistic cause for the existence of the universe.
Well, possibly, but for that you'd have to show two things, neither of
them trivial.
The first would be to show that the Razor is ontologically valid, i.e.
that Occam optimal theories are more likely true than those that aren't.
Now, Occam had a reason to believe this: since simplicity is more
prefect than complexity (modern ID folks take note), a perfect god would
only create a universe that's as simple as possible.
For rather obvious reasons, that justification won't work if the razor
is used as an argument to show that there is no deity.
Are there other reasons? Small libraries have been written on this, but
the general consensus seems to be: not for the general principle. There
are good pragmatic, and even aesthetic, reasons to prefer the simpler
theory, but it is not generally truth-tracking.
To give you a flavour of the problems people encounter that try to
justify the razor: Assume there are 4 people on a remote island, Peter,
Paul, Mary and John. John is killed. Which of the two theories is more
likely true: 1) "Peter or Paul or Mary killed John" vs 2) "Peter killed
John".
now, there are more or less ad-hoc ways to remove such counterexamples
(relevance logics e.g. prohibit disjunctive weakening), but the result
is a much less general and, ironically, extremely complex version of the
razor for which a justification in probabilistic terms "may" just the
possible.
In biology, Francis Crick warned against the razor, and a very good and
balanced discussion is Elliott Sober's monograph "Ockham's Razors: A
User's Manual".
Now, if we assume for arguments sake that you can find an appropriate
justification for the razor, you'd have to show that theistic theories
are really not razor optimal. For this you'd have to decide first which
version of the razor you use - e.g. are you counting entities, or types
of entities? To illustrate, if you take the first approach, a theory
that says Napoleon was defeated by 25000 British soldiers would be
better than one that says he was defeated by 25001 British soldiers and
also much better than one that says he was defeated by 25000 British
soldiers and 50000 Prussians.
If you take the second reading, they would be equivalent, as they both
only use the same number - one - of type or category: soldiers.
But a explanation that he was defeated by 25.000 British soldiers and
150 cannons would be razor suboptimal, as would be 25000 soldiers and
main battle tanks, and would be 25000 soldiers and an army of invisible
killer ghosts.
The first version has the advantage that it has a clear-cur criterion,
and the disadvantage that it is in most cases wrong (there really were
50000 Prussians at Waterloo, and they were needed for the victory, even
though they came late).
The second version is more plausible, but notoriously vague, as it now
depends on what you count as "the same type". Are Prussian and British
Soldiers the same type? Soldiers and cannons? Soldiers and ghosts? All
that without question begging - so if you draw the line at "ghosts", you
need to give independent reasons for that choice.
So you'd then have to decide which reading you chose, and show your
work. Issues would be if one deity is not a much simpler explanation,
under either reading, then infinitely many possible universes that at
least some cosmological theories postulate. Generally, "god did it"
seems to score high on simplicity grounds.
>