Sally remembered her previous life, she said. Actually, she had identified with Christina in Andrew Wyeth’s painting. In her previous life, Sally couldn’t walk and lived in a gray house surrounded by wheat fields. Buddhist thinkers were suspicious about the soul/body dualism. They believed more in impermanence of all things, not in the immortality of the soul. Erwin Makkerschmitt decided to settle the matter scientifically. Like Bess Houdini, he gave people who were about to die a code, known only to themselves, and he held séances in which none of the departed could reveal the code. He published his findings but they didn’t hold up to peer review, because it’s difficult to prove that things don’t exist by not finding them.