ar: رجوعا الى بدايات الفلسفة وبالتأكيد طوال تاريخ علم الأعصاب, كان هذا لغزا صعب دائما توضيحه احدث جدلا كبيرا
en: All the way back into early philosophy and certainly throughout the history of neuroscience, this has been one mystery that has always resisted elucidation, has got major controversies.