 Here's the argument. The Chinese and Russians do what's called microtesting, which they assume we can't detect. Now, the disarmament community says that technology is so great that we can even determine microtesting, meaning they're very small, sub-kiloton level. And that's unknown, because the only people that know in the intelligence community aren't really telling us how. And if you can't detect something, how do you know you can't detect it?