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> The logical operators do not seem to interact as I expect
> with argument adjustment:

Logical operators, like all operators, adjust their operands to 1 value before
performing any operation. In fact, the only places you can use a function call
and get all its returned values is in an assignment:

 a,...,b = f()

or in a return statement:

  return f()

Any other use of a function call will adjust its results.

-- Roberto