Instructional psychologist Andrew Ortony gives far more express detail: "Metaphors are required for a communicative machine simply because they allow the transfer of coherent chunks of properties – perceptual, cognitive, psychological and experiential – from the car which is thought to a topic and that is a lot less so. https://metafora08530.wikiinside.com/2051057/the_2_minute_rule_for_metafora