Primary rebellious psychology
Your son likes to play the devil's advocate, which should be caused by the germination of primary rebellious psychology. Don't be too nervous.
Adult attitude
I think the important thing is the attitude of adults. Adults have a strong sense of right and wrong. Children can point to black and say white, no problem. If adults know that the child is wrong and let it go, there will be a problem.
Correct guidance
You can slowly guide your child to understand the right and wrong sides of things with the maturity of shame, and tell him that dirty things must be dirty. This is not funny, because it is wrong. Tell him that right and wrong can't be reversed, and tell him that he can't "make a big mistake with a small one."
Step by step education
The child is really too young. Let's not worry too much about his education. We should guide him step by step and correctly understand the things and people around him. No matter what happens, once you find your child's cognitive ambiguity or mistakes, you must help him correct them in time, and you can't ignore them because of trivial matters. This is the responsibility of parents for life.