I noticed that in section 4, lecture 89 that the instructor repeats the phrase “We are going to explore using the Class Viewer to see the depth of Unreal’s class system”, twice, but with different tones.
It was hard to notice because he smoothly segues into the repeat as if the next point, which is really the same point, is a very different but very important. Perhaps each time emphasizes a different part of the sentence, which can influence the meaning of the phrase. Or, like some of the Asiatic Languages, completely changes the meaning by a simple change of tone 