docs: function addTopic(res, topic) {
      const keyTopic = topic.toLowerCase();
      if (!taboo.has(keyTopic)) {
        taboo.set(keyTopic, new RegExp(`\\b${topic}\\b`, "i"));
        saveList(res.robot.brain);
        res.reply(capitalize(`${topic} is now taboo`));
      } else {
        res.reply(`Oops, ${topic} is already taboo`);
      }
    }