[...] Guy presents An Introduction to Modal Logic commenting on his submission, “Plato and Aristotle have contributed many things to the [...]
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Um, “it is possible that” does not entail “it is that”. Invalid.
(3) does not follow from (1) and (2) and thus your attempt at discrediting modal logic is clearly fallacious. Given (1) and (2) you can only conclude that “it is possible that prince edward is the most common entity on prince edward island” but not that “prince edward is the most common entity on prince edward island.” and surely, being that we are not dealing with a necessary truth here, it is indeed possible that in some possible world prince edward is the most common entity on prince edward island, however based on prior knowledge from our actual world we know this is not the case.
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