>When comparing to some known value—especially zero or values near it—use a fixed ϵ that makes sense for your calculations. If you're ever doing mathematical c

>When comparing to some known value—especially zero or values near it—use a fixed ϵ that makes sense for your calculations. If you're ever doing mathematical calculations of any sort, it is a good practice to have a handle on the scale your numbers will lie within. If not just to be a better professional, it helps you choose an ϵ that matches.