What-If Questions Are Tractable Math Games

Even counterfactual or counter-logical 'what if' questions are tractable because they are rule-governed language games: asking what the world would be like under an inverse-cube gravity law is just a different math problem, and even asking what you could do if you could trisect an angle with straightedge and compass (a provable impossibility) is answerable by treating it as adding a trisecting instrument.