Ahh, but psychology and linguistics are involved, not just logic.
Don't get me wrong, logic is great and all, but a fair amount of the stuff we say isn't necessarily logical.
For example, if my friend asks me to come watch them perform in a concert and I say:
"I'll go tonight or tomorrow night."
In most contexts it would be completely reasonable to assume that this meant that I would not go both nights. This is despite the fact that the logical def'n of "or" would have no drothers with me doing exactly tha and still being truthful. In this case, the or is impliclity an exclusive and it's just an idiosyncratic use of language.
If I were to say, "Some of you will get prizes." It would be fair to assume that not all of you wll, even though it would not be logically inconsistent if you all did.
Given situations such as these, people will agree with my "reasonable" interpretations most of the time if tested. This isn't because they're stupid, it's because our language is complicated and doesn't always map well to logic.
In this case, it might very well be reasonable to read deeply into an exclusion, or not, it just depends on the context.
On a related note. I was walking across a parking lot a while back. I saw a sign that said:
"Warning: icy and hazardous conditions exist."
Of course I understood what it was supposed to mean. I still laughed for a good half a minute though. My GF thought I was nuts. *giggle*
Anyhow . . . now that you think I'm nuts, I'll sign off.
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StGabriel, the Taoist saint.