https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://philarchive.org/archive/WALTPO-31&ved=2ahUKEwjs1YOos6qAAxWrLEQIHfvKCy8QFnoECBYQAQ&usg=AOvVaw3i_OU52wSjloqNi8WznGF1
I’ve been trying to wrap my head around this one, but I can’t even get past the summary:
“He then claims that this possibility shows that the logic of metaphysical modality is not S5, and, in particular, that the B axiom is false. Dummett’s argument against B, however, is invalid.”
What is a B axiom?
I’ve found articles attempting to explain but alas, they remain beyond me.
Any help would be very appreciated
In: 0
The pdf you linked is faulty. Some symbols are missing.
I’ve found the first page here for free: [https://onlinelibrary.wiley.com/doi/10.1111/phib.12045](https://onlinelibrary.wiley.com/doi/10.1111/phib.12045)
And as you can see, there are two different symbols, diamond and square, and the square is missing from your pdf which make it unreadable.
I’m kind of lost about what it actually means, but I would suggest you focus on understanding the wikipedia page ([https://en.wikipedia.org/wiki/Modal_logic](https://en.wikipedia.org/wiki/Modal_logic)) as at least it has every symbols right.
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