To test whether Reppy was right, Kim spun the larger apparatus in which the cylinder sits: the apparatus spun in just one direction, while the cylinder spun one way, then the other, as it had before. He reasoned that elasticity should affect only how quickly the cylinder switched direction, not its actual spinning rate. Therefore if Reppy was right, and the solid helium was a quantum plastic, adding a constant underlying rotation should not change the results.
His team found, however, that it did. Unlike in the original experiment, the direction switches did not get faster with a falling temperature.