I'll admit most people have played more with these models than I have, but I was really struck by how it would helpfully explain the structure of a LOC call num

I'll admit most people have played more with these models than I have, but I was really struck by how it would helpfully explain the structure of a LOC call number to me in ways that were just... incoherent within the span of two sentences – claiming that the first two digits of a Cutter number were from the author's name, but also that all the digits together represented the count of works under that author initial. Either sentence might have been plausible in an explanation of call numbers within some system - but together they were self-evidently wrong – and yet the kind of thing that someone less familiar with the material explained might have been confused by, might have assumed was their own failure to understand. Suffice to say: hoo boy I hope all y'all commenters aren't tacking these APIs directly onto systems where the results have real consequences.