Disagree strongly. What the heck is "evidence" for morality? Unless "emulate X" is one of your values, your ethical system needn't aspire to approximate anything.
But if you are settling a question of morality, I take it as being a question between multiple people (that's not explicit, but seems to be implicity part of the above). One's personal ethical system needn't aspire, but when settling a question of group ethics or morality, how do you proceed?
Or for that matter, how do I analyze my own ethics? How do I know if I'm achieving ataraxia without looking at the evidence: do my actions reduce displeasure, etc? The result of my (or other people's) actions are relevant evidence, providing necessary feedback to my personal system of ethics, no?
Here's the new thread for posting quotes, with the usual rules: