I think I was hallucinating this morning...what do you think?

Well it all started last night. I was going through mine and Rylee's (9 1/2 months) clothes that were too small. Actually I still had my maternity clothes in my closet and Rylee's newborn clothes in the floor bagged up. It was driving me crazy. Anyway, she was in her crib watching Dora and playing with Daddy. Daddy was singing the map song to her and at the end daddy said "Map" and Rylee promptly said "map". Plain as day. She likes it when the wonder pets sing, so daddy likes to sing "linny, tuck, and ming ming, too" to her. For a few days when you say "tuck" she says "dut". This morning really got me though. We went into the kitchen and I put her in the floor to play. She crawled over to her book and said "book" then she turned the page to the dog (it's a touch and feel book) and said "dog". I was just shaking my head-convinced I was hearing things. Then she crawled into the living room and picked up the phone charger my hubs had left in the floor and said "dat" (that), and I said "no you can't have 'dat'" Then I realized I was talking back to her. Ugh...I am so sleepy today, could she just be imitating what we are saying? I dont' think she actually knows she is saying words. It was just so funny that she kept saying stuff this morning. I mean she has just gotten to where she says "ma-ma" and "da-da" to the right people and she has been saying "bye-bye" and waving for a couple of months. She has also came out with "uh-oh" a few times when she drops something. So, what's your opinion? Do you think saying those other words was just an imitation of us talking?