Oh, one more.... When the second child of the one above was 12 months old she got her hands on a box of cherrios (which her mother kept on hand to give a hand-ful if a kid needed to eat right-now!). The little on happily sprinkled the cherrios all over the kitchen and eating area floor. Her mommy saw her looking proud and happy and then she saw the cherios! Now, this little one had a brother who, in his adjustment to having a new sibling and less attention, liked to blame anything odd on his sister, as in "Julie did it!" When this little girl saw the look of horror on her mother's face she quickly said "Daddy-dit-it", very cleverly using words she knew somehow fit.
Also, her mother swears that when she was a week old she was leaning over her and saying "I love you" repeatedly and that this one said back "I oove oooo". I saw and heard her laugh when she was a couple of weeks old.
We just don't know the extent of understanding and brain developement of infants!!!