Musical Illusions

To what extent is the popularity of a procedure related to its validity? In Musical Illusions, Prof. Diana Deutsch describes how the celebrated Octave Illusion can be directly applied to the wold of clinical medicine.

Knowledge and Religion

TOK In Action: historian of religion Nile Green, UCLA, describes the profound disconnect he experienced between what he had read about Sufism and what he personally encountered when he began to visit Sufi shrines.