Looking back at the Q&A you are asking about (both Q&A have been deleted, but here is the link for 10k users), I would actually argue that the answer is essentially a complete answer. It's actually closer to "complete" than "near complete" in my view. The only step the answer omitted was solving a quadratic equation -- the answer even said which of the two possible solutions to pick from the quadratic equation.
In other words, the answer was complete in terms of the physics and the equations, the only step that was left was the math.
If the answer only described what sign convention to use and how to pick a sign convention, I probably wouldn't call it "complete" nor "near complete." The asker would still have to figure out how to take the general physics notions and apply it to their problem. They would still learn something by thinking through the process, by thinking through the translation from concept (sign convention) to application and solution. Instead, the answer only made them think through how to solve a quadratic equation -- it didn't even require them to think about which of the two solutions are valid.
In the end, it is a bit fuzzy about what "near complete" might mean. In the case of the answer you are asking about, I would say it isn't even close to being fuzzy. It's pretty clearly too close to a complete solution, rather than a set of hints and physical concepts to guide the asker to the solution.
When in doubt, think like the professor assigning the homework. How would they answer the question? It's unlikely they would walk them through all the equations all the way to the end and then say "Okay, now solve this equation, pick the positive root, and then write it down for a grade." The professor would probably ask them to draw the free-body diagram, ask them how they should define vectors (sign and magnitude), and then clear up any confusions on those two points. Beyond that, the student is on their own.