07f1dddf_o_Solve_it___What_is_Strategy___Formal_analogue
[Heuristic] Variation of the Problem [Informal Description] Can you vary or change your problem to create a new problem (or set of problems) whose solution(s) will help you solve your original problem? [Formal analogue] 
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George Pólya: How to Solve it | What is Strategy?
Formal analogue