Quote:
Originally Posted by kerry
Yes, that's what I was getting at. It's the black swan example. There are no white cats is a universal negative claim. But not all negatives are universal claims.
For instance, the hydrogen system in question does not work can be proven. It's not a claim about all hydrogen systems it's just a claim about this particular one.
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Wrong. It's still a more universal negative than you can actually "prove" (again, no one in the real scientific world uses that word).
You can prove that it doesn't "work" on your car specifically, or that it doesn't work on any of the cars it's been tried on. But unless you can try it on every car in the world under every condition you cannot "prove" anything.
Again, you can find evidence SUPPORTING the claim that the system doesn't work. You cannot "prove" it.