In response to Harry Binswanger, I wrote:
My diagnosis of our disagreement is as follows. You think that what is causally necessitated (e.g. the lunar craters) is broadly-logically necessary (BL-necessary) whereas I think that what is causally necessitated is broadly-logically contingent. Because you think that what is causally necessitated is BL-necessary, you naturally think that my having my hat on is not causally necessitated. If I've understood you correctly, you do not deny that there are BL-contingent events, an example being my freely choosing to put on my hat. What you deny is that there are any BL-contingent events in nature (the realm of the non-man-made).
Your scheme makes sense if (i) time is [metrically] infinite in the past direction; (ii) nature always existed; (iii) nature exists of BL-necessity (also known in the trade as metaphysical necessity) and nothing about nature is BL-contingent. On these assumptions, every event is BL-necessary. Add to that the assumption that every event in nature is causally determined, and we get the extensional equivalence of the causally necessitated and the BL-necessary. Man-made facts, which you grant are BL-contingent, are not causally necessitated because, for you, X is causally necessitated if and only if X is BL-necessary.
If the foregoing expresses your view, then I think I have isolated the source of our disagreement: we disagree over (iii). I see no reason to accept it. Do you have an argument?
Binswanger responded:
Your "diagnosis" is correct in spirit. I have quarrels over formulation, but there's no need to discuss them here. So we disagree about (iii): the existence of nature is logically necessary and nothing about nature is logically contingent.
You ask for an argument for that. Well, the first part is axiomatic: "existence exists." What makes that logically necessary? The fact that "existence doesn't exist" is a contradiction. "What is, is; what is not, is not" Parmenides wisely said.
The second part is non-axiomatic, and derives from causality. Objectivism holds that causality is the application of the law of identity to action. Things do what they do because they are what they are. For the fragile to act as non-fragile would be the same kind of contradiction as for glass to be not glass. This view of causality rejects the Humean event-to-event idea of causation (which actually originated with Telesio, I believe). We go back to the pre-Renaissance (broadly Greek) view of causation as a relation between entities and their actions.
Continue reading “Back to Parmenides: Binswanger’s Defense of Rand’s Block Universe”