I fail to see how it can be demonstrated conclusively when you're in a war condition, a battle condition, and things are flying at you and you're trained to work in unison with the other party.
What could “conclusively” possibly mean under that scenario? I would think it would be putting on more restrictions. It would not allow for that freedom of interoperability that you're looking for in the rest of the bill by putting in an undefinable word saying to “conclusively” demonstrate.