Another, rather more technical topic could be to develop an answer to the question:
"Why are the definitions in VOA so complicated?"
After all, although I know nothing about VOA, I would think it started out as a cool idea that seemed simple enough.
But that when the exploration began, the topic was seen to be a logical minefield with numerous pitfalls and unfortunate explosions.
Thus, the winding path to today's definition has been one of trial and error that could be interesting to look at.
Not the least some of the spectacular errors made at the beginning.