The mmain argument Bitzer makes is that rhetorical situation sets things up for rhetorical discourse. He gives examples on how a situation controls how a discourse is made and all the constraints. He also talks about the characteristics of what makes a rhetorical situation. Like if the situation needs a response, if a situation is real, and how a situation either decays or persists.
I agree with Bitzer that for rhetorical discourse to happen there has to be a situation to respond to. Otherwise there is really no purpose to it. I thought it explained things well and everything made sense. He also gave example to prove his point and made things easier to understand.
Emma Watson speech
Exigence
Gender equality
Audience
The UN, all men and women
Constraints
She has to speak a certain way because it is the UN and she has to be respectful. And she has to have enough support for both genders and not focus on just one.