Well, for some reason Pete don't look pleased, and he's real unhappy by this time, but he tries again. "Hey, Sacks, what'll you gimme for--" He don't get a chance to finish. I'm only listening with half an ear, but I'm so surprised I stand up like I been stuck with a pin. Sacks says, "Whatinell would I do with a left shoe? You know I don't use 'em." Pete looks at the thing in his hand, and the Prof and I go over there. The Professor looks at the thing real carefully and speaks up. "Say, Pete, look at that thing and tell me what it is." "Why, it's a brand new bar of soap, of course. I don't use it, but one of you might want to. What's all the beef about?" "Soap?" I say. "Why, you poor fish, something must have happened to your eyes. When you offered me that straight razor, I thought you'd gone off your nut. Now I _know_ it." The Professor interrupts. He looks excited. "Wait a minute, Eddie. To me that item looks exactly like a full fifth of Old Harvester, 100 proof. Used to be my favorite, before I became an abstainer. To Pete, it looks like soap. To you, it looks like a straight razor while, to Sacks, it resembles a shoe. Does that give you any ideas?" "Means we're all having hallucinations," I grunts. "Exactly. Pete, was there anything else in the location where you found this thing?" "Nothing but some scrap tin." "Show us." * * * * * So, the four of us wanders across the field and, sure enough, there was this silly-looking object lying there. It was about eighteen or twenty feet across, and two feet thick, and I nearly made a fool of myself. I almost screamed when I saw six straight razors _crawling_ out of a hole in its side. The Professor whistled. "Grab them, boys. We want them." Well, Sacks sacrifices one of his sacks, and we rounded up fifteen of the useless things. We went back to the jungle, where the Prof explained it. "Look, fellows, suppose you were a being from another planet that wanted to take over here. Suppose, further, that you were rather small and relatively defenseless. To finish the suppositions, suppose you were a positive telepath, with not only the ability to read minds, but also the ability to create visual and tactile hallucinations. How would you protect yourself?" A light began to dawn, but I didn't say a word about it. The Professor continued. "If you could do all this, you'd make yourself look just as useless as possible. To Pete, you'd look like a bar of soap, because he never uses the stuff. To Sacks, you'd look like a shoe, because his dislike for shoes is evident in his mind. To Eddie, who is proud of his beard, you'd look like a razor, while to me, you'd look like a bottle of booze, because I dislike its effects intensely. In other words, you would assume an imposture that would assure you'd never be picked up, except by someone like Pete, who would see in you a salable item, even though not a usable one. It may be, Pete, that you have saved the world."