The brothers Temple entered Earth City's one tavern quietly, but on their arrival all the speculative talk subsided. The long bar, built to accommodate half a hundred pairs of elbows comfortably, gleamed with a luster unfamiliar to Temple. It might have been marble, but marble translucent rather than opaque, giving a beautiful three-dimensional effect to the surface patterns.

"What will it be?" Jason demanded.

"Whatever you're drinking is fine."

Jason ordered two scotches, neat, and the brothers drank. When Jason got a refill he started talking. "Does T.A.T. mean anything to you, Kit?"

"Tat? Umm—no. Wait a minute! T.A.T. Isn't that some kind of protective psychological test?"

"That's it. You're shown a couple of dozen pictures, more or less ambiguous, never cut and dry. Each one comes from a different stratum of the social environment, and you're told to create a dramatic situation, a story, for each picture. From your stories, for which you draw on your whole background as a human being, the psychometrician should be able to build a picture of your personality and maybe find out what, if anything, is bothering you."

"What's that to do with this response to environmental challenge thing?"

"Well," said Jason, drinking a third scotch, "the Super Boys have evolved T.A.T. to its ultimate. T.A.T.—that stands for Thematic Apperception Test. But in E.C.R.—environmental challenge and response, you don't see a picture and create a dramatic story around it. Instead, you get thrust into the picture, the situation, and you have to work out the solution—or suffer whatever consequences the particular environmental challenge has in store for you."

"I think I get you. But it's all make believe, huh?"

"That's the hell of it," Jason told him. "No, it's not. It is and it isn't. I don't know."