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by Dayshine
1347 days ago
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As a counterpoint: I find the implicit imprecision caused by having poor/no divisibility a constant frustration in my day-to-day life. For volume: US based recipes very often resort to "1 cup", and I generally find they're rounding a long way from... say... 3/4 cup. In metric, people don't tend to round more than 10ml at a time, so you'll see 120ml, not 100ml when they mean 120ml. For distance: "About an inch" is the most useless instruction in DIY or crafting. People seem to be very reluctant to use the awkward and 3 fifths or w/e you end up with in imperial. When you say "people are better at estimating", are you adjusting for the reduced precision? |
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No, I wasn't thinking about it that way. I was imagining a task where you get people to estimate the length of various objects by looking at them, and just take the mean error. So the size of the units wouldn't matter. If someone wanted to say 1.33268 inches, I'd let them.
Concerning divisability: it depends on how you think about it. Many people found dividing in half, and half again, etc. to be intuitive, and it is intuitive in e.g. woodworking (because physically dividing in half is easy), but yeah...in a lot of applications I just want to be able to move decimal points around.
For volume in recipes: you're right. I think the problem with the U.S. here is that we use volume in recipes at all. Weight! Use weight! Flour is many different densities... But yeah, recipes are in general trash. For your case, you'll usually see cups and tablespoons (...lol) like "1 cup plus 2 tablespoons".
For distance: "about an inch" makes a lot of sense to people raised with inches. It doesn't strike me as weird at all.
Concerning awkward 3 fifths: imperial wouldn't use fifths, it'd be divisions by two. So half, quarter, eighth, etc. There are some specific cases, like a bottle of liquor is often called a "fifth" because it's approximately a fifth of a gallon, but that's specific to that application.