Define good or evil, and not just semantically define it, I mean an objective empirical definition, if I were to be as evil as Hitler how many babies would I need to steal candy from? What is the smallest measurable amount of evil? What is the smallest measurable amount of good? Because they're inherently the opposite of on another you only need to solve one side of the equation (so to speak) and you get both answers.
It cannot be done, be cause good & evil are not inherent, they cannot be inherent because they are not universal, our concepts of good/evil are inherently predicated upon a human bias.