Are they? Can you show that to be true?
I think your ranking is based on your personal preference. I'd say "the Universe is the end of the chain" is stronger because we know the Universe exists and there's no evidence that a longer chain exists.
Are they? Can you show that to be true?
Unless you have a specific definition of 'shown' In the case of the universe, a statement that the universe just is renders the universe as the necessary entity. A statement that the universe has existed for ever and therefore needs no causal agent renders the universe as, the necessary entity. A statement that there is an infinite chain of contingent causes, then the infinite chain is the necessary entity.
An infinite chain of contingency it seems suffers from the problems with an infinite causal chain not actually coming up with anything and objections to there being real rather than mathematical infinities.
The word contingency means dependent on something rather than nothing. It is difficult to say where a something would come from in an infinite chain.
I think your ranking is based on your personal preference. I'd say "the Universe is the end of the chain" is stronger because we know the Universe exists and there's no evidence that a longer chain exists.
Fine, you have your necessary entity.......Trouble is there is nothing in the universe that has been definitely defined as necessary and since you talk of it being the necessary entity a) You accept them and b) you need to demonstrate necessity rather than contingency. If you decide that the universe is contingent then the chain must continue. And in a chain that necessarily continues one more step than'' the universe just is'' seems the most parsimonious and certainly more so than the infinite chain.
Now since you have chosen your necessary entity there must be sufficient reason for that choice being necessary, ''the universe just is'' doesn't cut it.
There are some definitions of contingency which say that the universe could have been another way. The extra step beyond the universe just being is therefore that which makes this universe this way. And you have to demonstrate what that is.
Over to you.
2 Are the rankings down to my personal preference?
You might think it's based on personal preference but I could say that about you.
For me it's down to this:
1: There is no sign of necessity in the entity known as the universe.
2: The Statement the ''universe just is'' not only not sufficient reason but gives no reasons at all.
3: Infinite chains of causation are not observed nor probably can be.
4: Any natural explanation for the universe in practice demands another explanation beyond it.
5: Since observation affects the observed, the status of the observed depends on the observer therefore if something is observed it is contingent and cannot by definition be a necessary entity.
6: There is a case for abstract necessities and therefore necessary entities probably exist. In fact is there any argument against Abstract necessities.