Something that I personally find frustrating about engineering is that people don’t distinguish between things that are necessary bc of physical/mathematical laws, things that are necessary for sociopolitical reasons and things that are just random arbitrary conventions.
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This is not true. You’ll typically find a discussion of why it’s involute, and most instructors will cover it. In my experience engineering pedagogy is pretty good about distinguishing arbitrary from non-arbitrary. Where it often fails is distinguishing sufficient/necessary.

