The Letter Test That Broke Delusion
In 1900, a young Yale graduate who feared he would inherit his brother's epilepsy threw himself from a fourth-story window in Hartford and survived. For two years afterward he believed that the relatives who visited him were detectives in disguise. He secretly asked his real brother to bring back a letter he had written, and when the visitor produced it, Beers accepted his identity and the whole persecutory structure collapsed at once.
