>In how many G20 members does the average person make significant, regular use of non-metric measurements in their daily life? This is an interesting question.

>In how many G20 members does the average person make significant, regular use of non-metric measurements in their daily life? This is an interesting question. The amount of usage would need to be quantified. The definition of "average person" would need to be explicit. You have data? Whatever the data might show, I am confident it won't show a stark division between the US, Liberia, Myanmar, and every other country. But if I'm wrong, that would be interesting. >Here, non-metric measurements are not part of the government-mandated curriculum That's exactly what I mean about a hyper-technical argument. Does the US have a government-mandated curriculum; is it an apples to apples comparison; does its treatment of metric measurements translate to actual classrooms, &c, &c, &c... >how much time do schools in France or Germany or Japan spend on teaching how many ounces in a pound or how many yards in a mile That might be interesting to compare with the US. If you have such a statistical analysis, would you share it?