It all comes down to getting to the source of the problem. How do you do it?
By asking why.
Is it enough? No, usually a simple response is the tip of an iceberg and you can ask a second why, a third why, a fourth why and so on, until you find the answer to your question.
Could it be answered in the first place? Maybe not, and the reason is because no result is dependent on one single cause. There are multiple causes that create an outcome.
Even so, we need to ask the question and not be afraid of learning the answers.