My granddaughter sometimes speaks in complete sentences that are enunciated clearly and there are times when she speaks in words, or phrases, and sometimes in language that is not understandable. When she was about 15 or 16 months, I was cuddling her in my arms and I said to her "I love you" and in perfect English her reply was "I love you too". I was taken aback and her parents said that they had witnessed such language on rare occasions. I saw a documentary on a young adult with Down Syndrome where the young man was not verbal, but his parents reported that one day, out of the blue, he said "I love you Mom." Is there anyone who has had similar experiences of these unexpected responses?