She still knows all of these things, but for example if you ask her what she just did and she was playing outside on her scooter, sh'd start talking about how the room is cold. You know something not relevent and I am sitting right in her face asking the same questions over and over. Is this a short term memory thing?
Are you saying that she used to know all that stuff but doesn't know any of it anymore?
Or are you saying although she is bright, she has moments where she is completely disoriented and doesn't recognize common requests or words?
In either case I think you need to call her pediatrician. It seems like it could be anything, from a mineral deficiency to a head injury.