Did you ever come across a person who was < x1, like a x0.5 (they overestimated)? I know developers generally undershoot, which is why we joke about making your

Did you ever come across a person who was < x1, like a x0.5 (they overestimated)? I know developers generally undershoot, which is why we joke about making your best estimate and multiplying it by 2-3. But does no one really ever reliably overestimates? If the answer is never or rarely then that lends a reasonable amount of credence to the idea of just multiplying your estimates. Because you most likely should and the chance of overestimating is low.