But if they said to transfer uranium to Minnesota instead, maybe it's still lizardoids and they just have space ship landed in Minnesota. And if they said to ship cornflakes and not uranium, maybe they know how to make nukes from cornflakes. With enough imagination, it is not possible to refute literally anything. Any action can be proof of any connection, if you're willing to accept conjecture and "well, it doesn't prove X is false therefore X is true".