Nothinggod said:
Hand in your contextualist based essay with the line "Mozart is excellent" and I can guarantee it will come back with a big fat F. I'm sure you would get a long way by arguing, "but that is truth to me." Also I would point out that you are incorrect to say that the statement "John Lennon was killed in 1980," is objective by your own logic.
i am actually working towards my phd in philosophy and i am interested in this topic. i did not present any arguments for the positions i outlined in the passage above and did not try to formulate the most plausible versions of each. i thought the above would suffice to at least get people to begin to think about how they want to explicit say what they mean by "such-and-such is all relative".
i will just say a couple words about contextualism here and leave it at that. there are indeed many linguists and philosophers who support some version of contextualism with respect to many expressions other than the obvious ones i mentioned like "I" and "here" - eg. determiners such as "every" and "some", gradable adjectives like "tall", verbs like "know" and "finish" (as in "John has finished"). it's best to look at their examples to understand what they are getting at.
let's take the following example:
i will have a party in the evening and i want to know if we have put all the bottles of beer we have bought in the fridge (so they are all cold when the party starts and so on). you check the fridge and say "every bottle is in the fridge". in the context of our conversation, it is not plausible to interpret you as saying that every bottle
in the whole universe is in the fridge. it is clearly false that every bottle in the universe is in there and we are both well aware of this fact. it's more plausible to take what you are saying to be something like: every bottle
we bought for the party is in the fridge. that's pretty obvious to those party to the conversation and also true. in a different context, where we are talking about bottles we are keeping for a different purpose, what is meant by "every bottle is in the fridge" may yet be different. for instance, if we are in conversation talking about bottles we bought at a certain date, by uttering that sentence you may say that the bottles we bought on that day are in the fridge. in sum, the example illustrates that the intuitive truth-conditions of utterances of the sentence in question seems to vary from one context of utterance to another.
the relation between the intuitive truth-conditions of a sentence and the meaning of a sentence as explicated by a theory of meaning for a language is complex. a speaker may utter a sentence with a certain meaning and yet say something very different. this happens in ironic utterances, for instance.
a contextualist theory takes the relation between the intuitive truth-conditions of the sentences in the examples and the meaning of those sentences to be very intimate. the meaning of a sentence on such a view is really sensitive to factors in possible contexts in which it is uttered.
there may be good reasons to locate the context-sensitivity of determiner phrases such as "every bottle" not in the determiner (in logic it's called a quantifier) "every" but in the nominal "bottle". (these reasons have to do with some linguistic constructions i won't mention here). some philosophers and linguists thus take many expressions of english to be context-sensitive, though speakers are not ordinarily aware of this context-sensitivity.
now, the more plausible versions of contextualism with respect to adjectives concerning taste ("good", "bad", "excellent", "delicious" etc.) posit a subtle form of context-dependence in these expressions, one that is not realized by ordinary speakers in the same way they realize the context-dependence of "I" and "here". one needs to consider a wealth of evidence from linguistic theory - as might be the case with "bottle", "tall" etc. to realize the fact, if it is indeed a fact. if ordinary speakers may not fully realize the context-dependence of an expression, such as "bottle" or "tall", it may seem to them that they are saying exactly the same thing in different context with an utterance of a sentence in which the expression occurs.
if indeed adjectives such as "good" or "delicious" are context-dependent in a similar way, then it may again seem to speakers that different utterances of "Rhubarb is delicious" mean the same thing even though different utterances mean different things. again, one way to motivate the view would be by reference to the sort of example i gave above for the sentence "every bottle is in the fridge." other considerations also bear on the issue.
all i am trying to say here is this: a contextualist theory concerning adjectives of taste may have some plausibility and the evaluation of the proposal is not actually a simple matter.
i actually get to grade papers from undergraduates these days, by the way.