>The author seems to assume causation when the studies only indicate correlation.
once I heard Feynmann say in a youtube video that (paraphrasal) "we don't know what causes gravity, we just know that it exists, it's a property of matter"
then I realized, our experiments never show causation, they only show correlation. gravity has 100% (in our experience) correlation to matter. admittedly, that's a pretty good correlation, but for all we know, gravity causes matter. energy too, apparently.
Philosophers have worried for a long time about whether we can actually observe causation.
David Hume was famous for arguing in An Enquiry Concerning Human Understanding that we can't observe it and we instead have a "custom" or habit of expecting effects to follow causes.
> After the constant conjunction of two objects—heat and flame, for instance, weight and solidity—we are determined by custom to expect the one from the appearance of the other.
Religious philosophers have sometimes gone to the extreme of occasionalism, where they've maintained that patterns and regularities in nature were just habits or customs that God chooses to follow:
once I heard Feynmann say in a youtube video that (paraphrasal) "we don't know what causes gravity, we just know that it exists, it's a property of matter"
then I realized, our experiments never show causation, they only show correlation. gravity has 100% (in our experience) correlation to matter. admittedly, that's a pretty good correlation, but for all we know, gravity causes matter. energy too, apparently.