 Why does the block tower fall down?
[Transcriber's Note: This etext was produced from Worlds of If Science Fiction, August 1957. "He's gone completely hay-wire. Nobody's been able to get near him for three weeks, and now at six o'clock this morning he decides he's leaving the Farm. And it stops things from going in. The first was from Roberts Bros., announcing another shift of deadline on the book, and demanding the galley proofs two weeks earlier than scheduled. As director of psionic research at the Hoffman Medical Center, he had long since learned how administrative detail could suck up daytime hours. When they were finally forced to recognize that this great and powerful force did indeed exist in human minds, with unimaginable potential if it could only be unlocked, they had plunged eagerly into the search, and found themselves in a maddening bramble bush of contradictions and chaos. They were trying to study phenomena which made no sense, observing things that defied logic. And the more they struggled, the thicker and more impenetrable the bramble bush became— But now David Lessing had discovered a pathway through that jungle, a theory to work by— At his elbow the intercom buzzed. "I think you'd better wait before you do that," Melrose said sharply, "because I'm planning to take you apart at the Conference next month unless I like everything I see and hear down here today. "I want to hear this fairy tale you're about to publish in the name of 'Theory'," Melrose said. "If the papers you've already published are a preview, we think it's false as Satan." "So far, we haven't found any way to set up logical controls," said Melrose. "We haven't been energetic enough to find an orthodox approach that got us anywhere. They sat in silence as the car dipped down into the rapid-transit channels beneath the great city, swinging northward in the express circuit through Philadelphia and Camden sectors, surfacing briefly in Trenton sector, then dropping underground once again for the long pull beneath Newark, Manhattan and Westchester sectors. In less than twenty minutes the car surfaced on a Parkway channel and buzzed north and east through the verdant Connecticut countryside. "Until we had to throw it out. "In fact, you can't really be certain that your instruments are measuring the children at all. "Only took them seventy years to climb it, thanks to a certain man's theories. A phenomenon exists.
 Unknown. It is too early in the field of psi research to accurately determine the answer.
 Lessing removed his helmet.  The children used their psi powers to influence Lessing into removing his helmet.  The children removed their helmets.  Unknown. It is too early in the field of psi research to accurately determine the answer.