Ok. Taxonomic systems are based on generalizations. Flynn's taxonomy works for the von Neumann model or Havard model cpu and extensions thereof. It does not include other system models, like quantum computing, IMO.
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Note the IMO - this is exactly the point with a taxonomic system. It is a generalization. So you get to work out how to apply it to some extent at least. However, I've been in the field for quite a few years - everything I've worked with, overseen the purchase of - fits perfectly. So, from a practical standpoint, today, Flynn works darned well. Practical == I can buy a tested, debugged, working box at a non-astronomical cost.
[/rant]
Seriously:
What do your lecture notes say? I would go with whatever slant your prof takes. As I said, the IMO factor counts for something in this endeavor.