You got that right goodconversations, even if they are still in development, there are still theories and investigations going on about a baby's memories, which you are some that you listed there. I'd like to focus specially on the first and last link that supports the theories about babies knowing things.
The articles tell us about babies knowing basic things such as the inability for solid objects to go through walls, corporal and sign language, some social interactions and such. Though it's true that they seem to know these things, I think they are due to intelligence. All cognitive abilities together is what forms intelligence, so I think is valid to say that babies use intelligence because they are using natural cognitive abilities to know these things, being this said, I dont think it's knowledge, I think its because of natural capacities using enviornment to produce the first knowledge.
Remember, knowledge is only a small part of intelligence, the rest is brain development, which is the most likely reason why people are naturally more good on certain subjects than others. UM has featured news articles about IQ not determining actual intelligence. Here is the latest one: http://www.independe...ds-8425911.html
I'd also like to add that primitive reflexes are a related example of what I'm saying. Thanks for the links
How do you define cognitition? What are the "natural capcities using environment"? How do intelligence and cognition relate?