No, the young child's judgements are dominated by perception. This is a form of knowledge. No, reflexes are already present when the child is born. There is a better answer. No, presumably they thought they were telling the truth.
Constancy is the only constant.
This is not the best answer. This is from Jack Block's research, but the same thing has been found by other researchers. No, most do not seem to change, although many find themselves in forms of work they did not predict as college students. No, very few older people perform better in the afternoon. Older people excel at this.