… does it make a sound?
This question was on the “Hypotheticals” episode of QI. I thought the answer was obvious; yes, it makes a sound, which exists independently of our perception. However, there was an argument about the definition of sound, that is whether or not the oscillation of air pressure itself is sound, or if it is just the cause of it. I’ve never seen sound defined as being something that depends on our perception of it. Is the answer as obvious as I think, or is there more to the definition of sound?