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David Given wrote:

Shmuel Zeigerman wrote:
[...]
 a1 = {  ["a2"] = 1, [1] = "a2",
     ["a3"] = 2, [2] = "a3",  }

...and the program has now told the user: "You have a3 emails waiting for
collection." Those field names aren't arbitrary, they're actual *data*.

Thanks for the good examples.
The conclusion may be like this:
There are names that are arbitrary, and names that are not. The first ones can be obfuscated, the second - cannot.

--
Shmuel