In the pre-modern vision of things, the cosmos had been seen as an inherently purposive structure of diverse but integrally inseparable rational relations — for instance, the Aristotelian aitia, which are conventionally translated as “causes,” but which are nothing like the uniform material “causes” of the mechanistic philosophy. And so the natural order was seen as a reality already akin to intellect. Hence the mind, rather than an anomalous tenant of an alien universe, was instead the most concentrated and luminous expression of nature’s deepest essence. This is why it could pass with such wanton liberty through the “veil of Isis” and ever deeper into nature’s inner mysteries.
All reasonings concerning matter of fact seem to be founded on the relation of cause and effect. But... the connection between cause and effect is not a product of reasoning, but of custom. — An Enquiry Concerning Human Understanding
the Aristotelian sense of logos as both reason and structure — Wayfarer
IMO, the Law Realists improved upon this by proposing that laws of nature entail a necessitation. They define a law of nature as a causal relation between types of things (AKA "universals"). Hume would notice the empirical evidence that every observed pair of electrons repelled each other, and label this a "constant conjunction", while law realists would say that electrons (a type of thing) repel each other - and this is constitutes a law. If A and B are electrons, then they it is physically necessary that they will repel, given that that this law exists.David Hume broke this supposed relationship. He argued that causation is not something we can deduce from reason alone — it's only ever inferred from constant conjunctions: "We see A followed by B, and infer causation." Hence, causation is not logically necessary but contingent and habitual. — Wayfarer
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