Eliezer Yudkowsky Singularity Institute for AI
... this logic applies with equal force to
cognitive machinery in the human brain.
In every known culture: joy, sadness,
disgust, anger, fear, surprise – shown by
the same facial expressions.
(Paul Ekman, 1982. Emotion in the Human Face.)
(John Tooby and Leda Cosmides, 1992. The Psychological Foundation ...