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Science can't measure good and evil. Those are hypothetical constructs. Hypothetical constructs don't lend themselves to empirical data. Scientists can analyze data and then offer their opinion as to whether it was good or evil, but science itself cannot measure good nor evil.
We can measure harm. We can measure pleasure and pain. We can measure better or worse outcomes. Those are not hypothetical constructs and those are the practical meanings of good and evil. Anything else is just armchair philosophy and we can certainly do better than that. This idea that the big ideas are somehow closed to science is nonsense. There's nothing mysterious about kindness, love, or hate. All of them can be measured and understood. Any effect they have on our lives and our existence can be measured. There is nothing closed off to the scientific method. Or at least no evidence of anything.
Cannot is an assertion. Please provide evidence to back up this assertion.
Because facts do not in themselves disclose values, which have to be assumed in order to interpret facts as having a moral valence.
I watched a Ted Talk by Sam Harris in which he made a similar claim about religion and its treatment of women. While his claim seemed to be that facts alone gave us a basis for morality, he had to constantly refer to what causes "human flourishing" and "human suffering"--as if it were also a fact that these aren't values, but are rather found in some natural law somewhere.
Now, to be clear, I more or less agree with the values he seemed to advocate (though I can think of some counter-examples). That's not the point, however: the values must be present in order for the rest of the argument to work, and those values are not in the world, but rather, a product of human intention.
It is merely an assertion that there are some kind of values beyond our experiences. Or values are based on our physical reality. They are not transcendent. Nothing apparently is. If you have some kind of evidence that suffering and flourishing, or some similar model, are bad indicators of good and evil, please share them.