How should we handle questions that are valid and focussed, but not answerable without large efforts? Many climate-related questions fall in this category. For example, one could consider the question how a closure of the Bering strait and the Canadian Arctic Archipelago would affect the phase of winter precipitation patterns in the British Isles. Probably quite interesting and insightful, but it takes a couple of man-years of modelling and quite a number of months of number crunching on a supercomputer to answer the question. Therefore, nobody is going to answer it except highly speculatively.
How should we handle such questions? Should we close them as not reasonably answerable or similar, should we keep it open and wait until a team of researchers actually has answered the question, or should we keep it open and welcome speculative answers?