Re: [w3ctag/design-reviews] WebXR Hand Input API Specification (#568)

> One quick question: can you explain why the API is named around medical terms for bones, rather than something more straightforward?

This is what every other XR platform does for hand input and we wanted to be consistent with expectations. There aren't any good names to use otherwise, you _could_ number things at best; but it still gets confusing: there is a joint _before_ each knuckle that needs to be included (the thumb one is the most important one), and intuitively the finger ends at the knuckle.

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