 Well, we don't. And you realize why? Because they have locators. Because they might trace us all the way back home without our knowing it. And we can't risk a non-human race knowing where Earth is unless we're sure of them. And how can we be sure? Do you know, Mr. Dort? Do you know, Mr. Dort, with your sentimental poly and a slush pile that calls itself your brain, your mind? Unidentified object retreating against our locator, sir. Back and forth.