On one notable occasion I had a similar discussion about sound with somebody and it turned out that she didn’t simply have a different definition to me—she was, (somewhat curiously) a solipsist, and genuinely believed that there wasn’t anything if there wasn’t somebody there to hear it—no experience, no soundwaves, no anything.
On one notable occasion I had a similar discussion about sound with somebody and it turned out that she didn’t simply have a different definition to me—she was, (somewhat curiously) a solipsist, and genuinely believed that there wasn’t anything if there wasn’t somebody there to hear it—no experience, no soundwaves, no anything.