EAllusion wrote:
I don't think he's doing that. I'm not even sure such an expression in this context would even be coherent. How is "natural" and "nature" getting defined here in comparison to the supernatural? He calls ghosts supernatural, but he only does so because convention holds they aren't understood to be part of nature. They could easily be in principle be a natural phenomenon if the world were different. We'd just say they were natural objects then.
I guess you didn't actually listen to the video. Go to the area around 4:09. His example is, one person believes in ghosts the other doesn't. He says if the believer were to offer an valid operational definition for what ghosts are supposed to be and produces valid evidence the other person might reevaluate and accept their existence.
In addition he first talks about non scientific beliefs and within that context he uses the word "supernatural". That is they are non scientific explanations for phenomenon.
So he does not discount the "supernatural/non-scientific explanation for phenomena might one day be scientific and explained withing the natural physical laws of science..whatever they may be at the time.
Atomic elements weren't understood to be part of the natural world in the year 1150. As a consequence they would be "supernatural" in this sense. Saying "nature is all there is" then would then imply our understanding of what is in the natural world is coextensive with all there is out there. In 1150, that would take atomic elements off the table. Who knows what that would take off the table today. No one is going to want to argue that. There are other ways to define natural/supernatural.
He did a great job.
For instance, I prefer to say an object is natural if that object behaves according to some coherent set of rules, however ultimately complex, and is amenable to empirical investigation.
And he said that, but in a much more consise clear manner.
He's just using calling things supernatural if they aren't part of what skeptics like him think is the natural world.
No he's not. He's saying that explaining phenomenon with non scientific explanations, in which there are no clear definitions which can be objectively evaluated and tied to the physical world, is insufficent to warrant acceptance of those explanations. But if people want to believe them, that's their priviledge.
His focus was on why one is justified in being skeptical and that rejecting scientific/supernaturalistic explanations for phenomenon is not being closed minded. His focus was not on how to critically evaluate scientific explanations which meet science standards used in practice.