Nope - you are completely misunderstanding the issue. You are implying that these necessary entities are somehow in conflict - that isn't the case, typically they are completely interdependent - needing to work together.
Then they are contingent on that need and neither is a final or full explanation eg, Give a full explanation of how a bicycle works.........Answer, Wheel'' It doesn't work does it. Why would they need to work together unless they were parts of the same thing?
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So here is an example. Where nerve cells meet there is a structure called a synapse. For the nerve signal to travel from one nerve to another it needs to cross that synapse. To do so the first nerve cell releases a molecule, a neurotransmitter, that can cross the gap. But for the signal to move along the second neurone that cell must have receptors that bind to the neurotransmitter.
So both the neurotransmitter and the receptor are necessary for transmission of the signal - however neither is sufficient - if you have the neurotransmitter but not the receptor, no transmission. Likewise if you have the receptor but no neurotransmitter, again no signal. You need both. Neither is subordinate to the other.
So you can consider both the neurotransmitter and the receptor as being necessary entities for nerve signal transduction from one nerve cell to another. There is no conflict - quite the reverse, both entities work together and indeed are required to work together, to get the desired response.
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Oh fuck we are back into contingency and nature again. What we are talking about is what is necessary for nature not what is necessary in nature. There is no conflct because they are parts of a whole and therefore are not two necessary entities but two parts of the one thing but contingent on each other. what would you say was the final explanation for why there are neurotransmitters and receptors. what needs to be in place to have neurotransmitters and receptors and what of those things that are not dependent on neurotransmitters and receptors but are dependent on what everything is dependent on, that is what we are really after
What you are merely agreeing with therefore is the contention that the universe is not necessary. That it is just a souped up machine like a bicycle. for something to be necessary it has to be the final and full explanation for the universe not part of it. For example you have merely produced a perpetual motion machine.
So to sum up if they are in agreement then that is because they are parts of the same one thing and therefore not at all analogous to multiple necessary beings at all. And this is why there is probably only one ultimate necessary entity.
What do you think then is necessary for the universe to exist. With energy I demonstrated that if all energy were potential nothing would happen since there is no energy transferrence and no potential difference even if there were potential energy.Energy cannot therefore be the necessary entity.