Human intelligence is not possible without human emotions. A computer is something that can never have emotions, so for that reason alone a computer will never be able to display intelligence. Which one of the following is an assumption on which the argument depends? ['Someone or something is intelligent only if it can identify its emotions.', 'Computer technology will not greatly advance beyond its current state.', 'A computer could have emotions only if it could display intelligence.', 'Being intelligent requires the capacity to have emotions.']