Thank you, Devon, for the cogent overview of the
difficulties involved in learning these fundamental
array concepts. I propose that three other items fall
within this general topic:
2 -- Appropriate use of the terms axis and rank, which
are closely coupled concepts.
1 -- The difference between comparisons of atomic
values and comparisons of arrays.
0 -- The relationship between noun rank and verb rank.
The first of these is minor, the second poses is easy
to resolve, and the final one is of enormous
importance.
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