question: Why does the writer say `` laughter is mostly about social responses rather than reaction to a joke '' ?
answer: because people can communicate with each other by laughing .
turker_answer: The writer said `` laughter is mostly about social responses rather than reaction to a joke , '' because people can communicate with each other by laughing .
rule-based: The writer says `` laughter is mostly about social responses rather than reaction to a joke because people can communicate with each other by laughing '' .