“ [It] is so important that it has been called a fundamental prerequisite of intelligence and has even been equated with intelligence itself. ”
ويضيف :‏ « [انه] مهم جدا بحيث قيل انه احد المتطلبات الاساسية للذكاء ،‏ حتى انه اعتُبر والذكاء بالاهمية نفسها » .‏