I stumbled upon these two questions which made me think:
What drives the plot for antiheroes? - is open and have several different answers with different ideas
How can I reasonably prevent Manual of Bodily Health abuse? - was closed as an "idea generation" question
In my opinion the first one is more "idea generation" than the latter. Are there any specific criteria we can rely on?
My concern is not about these two particular questions. Any problem-solving question can be called an "idea generation" question, since it asks for a proposed solution, not a fact. How can we ensure fair criteria for such questions?