The answer to a problem may be known but it is not understood. These questions explicitly request additional details on how a problem is solved or why the current solution is appropriate.
These questions request additional details on how a problem is solved or why the current solution is appropriate. The problem is not necessarily a puzzle itself; it may refer to puzzle-solving algorithms, published tips, or rules pertaining to how a puzzle may be solved. Often, the poster is aware of the answer to a problem but does not have or does not understand the solution.