Ah, thank you for the clarification -- yes, Newton loved his fluxions, didn't he? In future examples I'll s/Newton/Leibniz/ :). I think the general point is tr

Ah, thank you for the clarification -- yes, Newton loved his fluxions, didn't he? In future examples I'll s/Newton/Leibniz/ :). I think the general point is true about the brain freeze and too many big topics -- it's way too easy to just throw a definition out there, say "this represents slope which is the rate of change" and move on to the next idea.