There is no primary thing which something does.
One word... evidence.
It is obvious that this Is the case: if something had two primary modes of teleology... That is to say, that it had two ends for two reasons- they would logically contradict each other in most cases. Especially here.
The heart cannot simultaneously stop beating as it also beats, guaranteed by it's own telos.
I'm actually starting to think a few things. 1. You've only investigation of minute amount of metaphysics. 2. You don't understand the basics of the language to which these topics produce.
*Goal- an end bases in its very own teleology. Also referred to as finale causation.*
As I said before: if you want to do what Hume did, that causes problems. Other than that I don't see any reason for us to disagree. But taking a look at your profile, I can say you like that pitiful thing people call an intellectual haha.
Hume is wrong for a few reasons.
1. A thing which does not have a finale cause is something that is without teleology, and therefore, has no end to which it exists.
2. Causation which does not happen at that level allows for unprovoked change. Both substantially and accidentally. Especially where the accidens have no nature to which it can change at any given moment. Of course, without a cause.
3. Hume's idea of causation and change doesn't allow for a thing to change in-and-of-itself. Considering the action for change is preceded by it's own will to change.
(i) The thing desires to change accidentally
(ii) causation is not required for a thing to change.
(iii) the desire to change itself is preceded by the actual change. Which happens out of change without a required cause.
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By the mere desire to change, it changes. However, without any reason aa to why it changed other than it's will. Which denies the nature's of things ontologically speaking. This seems to object to much of what is observed and much of what the sciences have disclosed. But that was his point.
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This is all said if you are leaning on Hume, of course.