by ohthatpatrick Tue Nov 20, 2012 3:09 pm
Interesting philosophy of language questions you have there.
In regards to your first thought, yes, the knowledge of a specific example allows us to justify a broader wording.
Consider this example:
Joey the dog can bark to the tune of "Bridge Over Troubled Water", a deeply poetic song.
We could try to create a safe restatement of that with broader language:
A nonhuman mammal can convey signature elements of a work of art.
To support that claim, we only need 1 example of a nonhuman mammal conveying part of an artwork, which we have in Joey's rendition of the song.
Often on Inference questions, LSAT likes to use this safe but broad wording to make the correct answer seem less appealing or less obviously relevant to the specific topic being discussed.
But, again, the "can" is what makes it safe, because "can" only asserts a possibility, so it only needs one example to prove it's true.
If we used "most nonhuman mammals", "many nonhuman mammals", "often can convey", etc., then we would need more than one example to support it.
In regards to your second question, I think you were really highlighting two different meanings to the word "can":
allowable possibility
vs.
current ability
If I say, "my daughter can say the alphabet", I'm really talking about 'current ability'.
If I say, "an atheist can be President of the U.S.", I'm really talking about 'allowable possibility'.
I interpreted your "definiteness" as recognizing the usage that corresponds to 'current ability'.
Clearly, though, the two different meanings are based on context. I think the context for Q6 would imply that we're using "can" to mean "allowable possibility", but I think we could also support that Dodd thinks that "tree" has the "current ability" to be used as a scientific term.
Anyway, let me know if I missed part of your meaning.
Have fun!