Originally posted by yousers
Bbarr, sureley you can see this! You just agreed that different theories of knowledge/truth can find different truths. Value systems are based on things we know or believe to be true. Ethical systems are based on value systems. Therefore, people can have different ethical systems. They are RELATIVE.
You argue that people are not justified in having som ...[text shortened]... d theory of knowledge. Your method is not accepted by all people and is not superior to others.
I said no such thing. I said that people who define 'knowledge' or 'truth' differently will reach different conclusions about what is known or what is true. I never said their conclusions would be correct, and I certainly didn't say that they would "find different truths" (whatever that means exactly).
Value systems are indeed based on things that we know to be true. It is false, however, that all ethical systems are based on theories of value. Only axiological ethical systems are based on theories of value. Deontological ethical systems are not based on theories of value. Kant's ethical theory, for instance, is based on considerations of practical rationality (I'll spare you the details), not on considerations of what in the world is valuable. We can skip over this technical point, 'cause I know what you're trying to say.
You think that just because people disagree about ethical systems, that it follows that ethical systems are relative. This is both stupid and a misuse of the notion of relativism as applied to ethics. The fact that people disagree about ethical systems doesn't make ethical systems relative any more than the fact that people disagree about the age of the Earth makes the age of the Earth relative. Disagreement does not entail relativism. Repeat this to yourself until you get it. Then go look up ethical relativism.
Yes, I argue that some values are unjustified. No, I do not employ my theory of knowledge in these arguments. If I were to argue that, say, valuing the suffering of others is unjustified, I would not make any reference to the JTB (plus Gettier condition) theory of knowledge. You are simply mistaken on this point, so it would behoove you to stop making this claim.
Anyway, just because the JTB theory of knowledge is not accepted by everyone, it doesn't follow that it is on a par with other theories. You simply assert this without argument, and I see no reason in the absence of argument to take this assertion of yours seriously. Once again, for the third (fourth?) time, if you have an alternative theory of knowledge you think superior to the JTB theory of knowledge, then put up or shut up.