+A **rule of thumb** is a practical principle, broadly applied but not strictly precise. It offers a quick [heuristic](/wiki/heuristic) or guideline, born from experience rather than rigorous theory, to aid in [decision-making](/wiki/decision-making).
+## See also
+- [Approximation](/wiki/approximation)
+- [Best Practice](/wiki/best_practice)
+- [Common Sense](/wiki/common_sense)
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