"Incorrect" answer does not always mean it is wrong (and vice versa)

Mar 3, 2020 | Red Deer

That is why we often ask our kids at the centre: "How did you get the answer?" whether their answers are correct or incoreect to understand their perspectives.

Correct answer does not always mean a child understands the problem or the concept but it might be correct because they memorize it. Incorrect answer does not always mean incorrect way of thinking, it might be just the way they interpret a problem that we adults failed to see. 

https://www.asiaone.com/lifestyle/primary-1-girls-answers-math-question-sparks-heated-debate-online-creativity