OP, I'm not sure I understand the question. Kaplan's suggestion is (1) explain the assertion, define terms if needed, ideally give examples; (2) give counterexample; (3) resolve contradiction/explain when assertion applies and when it doesn't.

You're proposing to do exactly that but split (1) into two paragraphs.

That's not even different from the Kaplan strategy, the point of which is to do the tasks in order. They point out that a simple and obvious way to organize it is to devote one paragraph to each task, but the precise number of paragraphs your essay breaks into - whether that's 3, 4, 5, or 6 - isn't very important, as long as it's clear what you're doing.

(I got an R, and I essentially followed the Kaplan strategy though I didn't know it at the time, since the Kaplan strategy is basically just to follow the instructions in order. I have no idea how many paragraphs I used. At least three and fewer than ten, I imagine.)