The pooh pooh theory is the the idea that speech comes from the automatic vocal responses to pain, fear, surprise, or other emotions: a laugh, a shriek, a gasp.
Now, the yo-he-ho is the idea that speech started with the rhythmic chants and grunts people used to coordinate their physical actions when they worked together.
I remembered that Mr. Ian told us that the ta-ta theory is the idea that speech came from the use of tongue and mouth gestures to mimic manual gestures. For example, saying ta-ta is like waving goodbye with your tongue.
Can you still remember the dingdong theory?
Yes, dingdong theory is out of a natural correspondence between objects of sense perception and the vocal noises which were part of early humans' reaction to them. But forgot the pooh-pooh and googoo theory, can you explain it to me?