5 year olds argue a lot. With each other. With their parents - namely me. Yesterday Cole actually told us that he thinks we don't know anything and his friend Caden in Kindergarten knows EVERYTHING. I didn't remember these things starting so young. I remember thinking my mother knew nothing...but I really thought that started later. With the girls, they hit that mark around 11 and never really grew out of it.
I have also found that school has an additional, yet related "benefit" - the boys will believe ANYTHING their friends tell them. "Montana said his dad stabbed his mom", "Caden said he pulled out someone's eyeballs". They all have a morbid, ridiculous theme, and I kind of hate public school now. Also other kids. Sometimes even mine.