Approximation approximation, getting close enough to the truth for the purpose at hand, is how we use numbers and measures in the real world. We rarely need perfect precision. We need "good enough." How many people will fit? Approximately twenty. How long until the sun sets? About an hour. We round. We estimate. We say "around" or "roughly." That is approximation. First, we have a question that needs an answer. Then we see how precise we really need to be. Building a chair might need careful measurement. Guessing how many seeds to plant might need only "a handful per row." Approximation saves time and effort. It also reminds us that many answers are not exact. The world is messy. Our knowledge of it is often approximate, and that is enough to act. Approximation can go wrong if we approximate when we should be precise, or if we forget that "close" is not "exact." So the skill is knowing when "good enough" is good enough, and when we must measure more carefully. When we pass knowledge on, we pass on that judgment too—when to approximate and when to slow down and be exact. When is "close enough" good enough in your life? When is it not?