Why it is impossible to judge someone is good or evil.

At first, I want to set one premise that two concepts "intention" and "outcome" could be someone's moral standards to judge he is good or evil. (What else? If you can find other factors, let me know.) And I will focus on verifying whether these two can be really moral standards or not. Let's begin.

The first, "intention".

Can we say someone is good when he tried to do that for a good purpose but the outcome is bad?

If your answer is yes. You must say that the woman who has good intentions to help a guy but doesn't realize she annoys him by helping him because she is not enough to be clever to know it is still a good person. Really? (If you still say yes, it's all over and intention is destined to be the only way to judge someone's moral standard. However, I don't think she is a good person. Because she will keep annoying him due to her ignorance. So I keep on my process of thinking.)

If the answer is no. "Intention" itself can't be a moral standard.

The second, "outcome."

First, "target". Someone did something. His outcome is good for someone. But to someone else is bad. Then who is the exact standard of the objective to receives the effect of good or bad he did? What if some other people get a bad effect on him? We can't choose some specific target over others.

Second. "time". Later by butterfly effect, his first outcome for someone we thought it's a good turn out to be bad. As time has passed, the outcome we thought it turned out to be bad for someone turned out to be good again. Wait a second. Then what is the exact standard of time to judge whether his outcome is good or bad? We can't choose some specific period of time.

Therefore, "outcome" itself can't be a moral standard either.

Therefore, from the premise I set at first, it is impossible to judge someone is good or evil.