What are different things that can be solved?
For the purposes of responding to a complaint "I can't solve this!" with the intent: "That's because it's not a(n) ______".
Words considered so far:
Specifically the response should convey comfort to the complainant. "You cannot solve
this is not really a problem, so don't worry about it." None of the words I've considered seem to convey that tone without seeming improper. I want to diminish the validity of the complaint without implying the complainant is irrational for bringing this to me.