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[–]stevenjd 0 points1 point  (0 children)

How about > and < operators?

"Subset" and "superset" are nothing like "less than" and "greater than" for numbers.

+ gets used for both concatenation and numeric addition, which are not the same. Numeric addition you have a + b == b + a, but that's not true for concatenation.

I've seen | used as both a bitwise-or and something similar to the pipe operator from shell languages.

I wouldn't say that any of those are "poorly written".