Comment by Jensson

> If I ask my friend what his favourite song is 100 times I will get the same answer back 100 times.

Pretty sure you wont, humans vary the exact wording. They will say the same song but they wont answer the exact same way every time. Even if they say the same words two times they wont use the same tone and body language, as they don't just communicate via words and that nonverbal language is a part of what we say.