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Show HN: Unsure Calculator – back-of-a-napkin probabilistic calculator

Published on: 2025-04-26 19:22:59

Unsure Calculator Loading... Calculate with numbers you’re not sure about Hi, I'm Filip, and I'd like to introduce to you an early version of an uncertainty calculator. Statistics are scary, but they don't need to be. If you allow me to simplify, the field of statistics is just saying: I'm not certain about these numbers, but I would still like to reason about them. Turns out we're unsure about a lot in our lives, but we can't just throw our arms in the air and say, well, I'm not a statistician. Filip’s imperfect uncertainty notation The idea is simple: apart from regular numbers (like 4 , 3.14 or 43942 ), you can also input ranges (like 4~6 , 3.1~3.2 or 40000~45000 ). The character between the two extremes of the range is a tilde ( ~ ), a little wave symbol. You can find it on most keyboards, but for convenience, I also included it in the keypad above. The range notation says the following to the calculator: I am not sure about the exact number here, but I am 95% sure it's some ... Read full article.