Once again you say: (for about the 5th time).
"There are no white swans" is unfalsifiable
Finding a white swan, anywhere, any time, any place is at least theoretically possible, and that would immediately falsify the claim being made. To FALSIFY this claim would not require that you know the color of every swan in the universe. That's only what would be required to PROVE, not FALSIFY, the claim.
I'm just repeating myself now, too. We're just going around in circles. You've said nothing which addresses my position, other than to deny it, and hence have done nothing to persuade me that I'm wrong.
Although the claim quoted is OPPOSED to the claim that "all swans are white," they can both be falsified in the same way, i.e., find a single instance where the claim is untrue. In one case you would need to find a white swan, in the other a non-white swan. That is not a difference in "falsifiability." It's just a difference in the content of the specific falsifying observation needed.
Only a single exception is required because both claims are universal and absolute in form, not qualified. They are both different than than saying, for example, *some* swans are white or *some* swans are not white. That may be where your confusion is, I don't know. But it would require knowledge of ALL swans in order to falsify a qualified claim, so maybe that's what you're thinking of.
As I've noted before (as wiki also has) proof and falisifiability are kinda inversely proportional. It is virtually impossible to PROVE a universal claim, but a universal claim can, in theory, at least, be rather easy to falsify. On the other hand, qualified claims can, in theory at least, be easily proven but almost impossible to disprove (falsify). If I can find one white swan, then I will have proven my claim that "some swans are white," for example (which would, incidentally, falsify the claim that "no swans are white"). But finding 10,000,000 green swans without ever finding a single white one would NOT falsify the claim that "some swans are white." It would easily disprove the claim that "all swans are white," however.
This is what I was implicitly pointing out, way back in post 22, when I said:
Suppose one of my homeys claims that "all grass is blue," and I claim that "all grass is green."
If I can find a single piece of green grass, then I have disproved (falsified) his claim.
But I have by no means proved my claim.
Edited by Moronium, 29 April 2018 - 12:23 PM.