In 1950, speaking to an audience of 6,000 in the Shrine Auditorium, Los Angeles, Hubbard introduced a coed named Sonya Bianca as a clear who had attained perfect recall of all “perceptics” (sense perceptions) for every moment of her past. In the demonstration which followed, however, she failed to remember a single formula in physics (the subject in which she was majoring), or the color of Hubbard's tie when his back was turned. At this point, a large part of the audience got up and left. Hubbard later produced a neat dianetic explanation for the fiasco.