You would never do that, I wouldn't either, but in machine-to-machine API interactions, this tends to crop up - i.e. a SW stack where this implies "an array of

You would never do that, I wouldn't either, but in machine-to-machine API interactions, this tends to crop up - i.e. a SW stack where this implies "an array of `a` values and a scalar `b` value" sends the data to a SW stack where "last `a` wins, last `b` wins", and strange bugs ensue, as both sides insist they're doing The Right Thing :)