I believe cochlear implants since deaf people often read lips and watch hands which is both sign language and visual communication
i think deaf people would prefer getting together in person as well since it is easier to read lips and/or see signs
whilst cochlear implants not everyone will have them and they wont be bothered by it so thats why i'm saying Cochlear implants
sorry if im wrong...
Because back then they believe that if they didn't see it then it is not there or created for example when the french believe that the earth is flat but we know now that it is round.
