My son is 3yrs, 8 months old. He has recently begun "talking back" to us. Not just saying "NO!" to instructions but also contradicting what we say - For example, Me:You need to be patient; Patience means waiting nicely until it is your turn. Him: "No! Patience doesn't mean that!". When it first started happening I more or less ignored it hoping to take the wind out of his sails but now I've begun sending him to his room immediately after an occurrence. What is the best way to deal with this?