Why is it that babies will know something one day, and then seemingly not know i

  1. L a d y f a c e profile image78
    L a d y f a c eposted 7 years ago

    Why is it that babies will know something one day, and then seemingly not know it a few days later?

    I don't understand why they say something for a couple of days and then suddenly, they don't know the word 'yellow' or 'ma ma' anymore. ?

 
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