How do you stand up to a grown up?

Well if you want to stand up to a grown up you need special skills. First you cant be afraid! then they will know that they are going to win the war. Second, you need to know what you are going to say, that way you dont look like a fool when you dont know what do say! Third, if you want to stand up to an adult you need to have a good reason to, if you just stand upi to them for no reson then they have a good reason to punish you! Fourth, you need to look good to. What i mean is you need to look professniol if you want to get what you are saying into there head! So they understand... i