Someone once asked...

How do I know if I’m dealing with a. Unsolvable question?

Someone answered with kindness...

There is no clear way to determine if a question is unsolvable, you must work on questions that call to you.

Another soul answered...

Every question is unsolvable until you find an answer. Better question is how much the potential answer will be valued and how much time and resources you willing to spend to find this answer?