1.A stepping stone is something you move on to, not because you want to stay there but because you want to get somewhere else.
The drawing on these notes shows movement on to a stepping stone and then off again in a forward direction. Ideas can be used as stepping stones in order to move on to new ideas.
2. Look at the statement:
"Po: both teams should be able to win a basketball game at the same time."
You could say this statement is silly, ridiculous or impossible. But because we have used po, the statement is to be used creatively as a stepping stone.