I have a theory that children reach a high level of mental capability very quickly. What they lack is experience and an adult level of language facility. I th

I have a theory that children reach a high level of mental capability very quickly. What they lack is experience and an adult level of language facility. I think it's a very good idea to speak using easy to understand language when talking to children. However, I also think it's a good idea to expect that they have very good reasoning ability if given enough information.