Dear Ralph,
I'm sorry that you get frustrated but this is still for all intents and purposes a technical discussion so I don't think it does any good to be vocal about it. There are good points and bad points, arguments and counter-arguments. I can also get upset when I feel indifference or dishonesty in a response that's meant to be an argument but I think a thread like this should read like valuable technical content to an "outsider".
you cannot reasonably indicate for an array that it doesn't have valid content, as opposed to being empty by chance If you mean indicate it's undefined, then here's one way:
my @array; say @array.elems; # 0 say @array.so; # False