I'm not sure if we are on the same page here. What I am saying is that: - most (all?) topics are not 1-dimensional: they deal with multiple issues with many c

I'm not sure if we are on the same page here. What I am saying is that: - most (all?) topics are not 1-dimensional: they deal with multiple issues with many complicated interrelations and interactions. Let's call them multi-dimensional. - many people build 1-dimensional presentations using PowerPoint (and related tools). - treating a multi-dimensional topic as 1-dimensional makes for a poor, confusing presentation. To connect this with your point: the hard part of building a presentation is mapping an n-dimensional topic onto a 1-dimensional medium (time), while sacrificing the minimum amount of accuracy. Based on personal experience, many people don't spend much time on this part; they just throw a bunch of information onto slides in an arbitrary order. And so this smacks of circular reasoning to me: > If you are going to talk about point A.1 before point A.2, and B.1 before point B.2, but you will speak about point B.1 before point A.2, then just put them in that order. Problem solved. But how do you know you're going to talk about point A.1 before point A.2? Figuring that out is the hard part! ----- All this is just my subjective opinion, of course. :)