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Most of the look of the thing is about the built in tools and skills and harness settings, not the quality of the code. those things can be replicated locally as well.
Which is why there is this disorientating feeling. We are all facing now with an ongoing challenge to epistemological trust, like
Someone suffering a mental disorder.
It's fine to be forgetful of maths that you're not actively using. (I am speaking as a mathematician.) It's also easier than ever to get a quick reminder or introduction, e.g. for this Google something like [what does e1 with ^ on the e mean], or [standard basis vector] from earlier in the sentence, or ask another AI.
I was never actually taught ê as unit vector notation. I did game development for years and am quite familiar with 3D math but a lot of formal math notation is very foreign to me.
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