On Sat, 14 Apr 2007 16:26:51 GMT, Matt Whiting
wrote:

Dan Luke wrote:
"Matt Whiting" wrote in message
...
Dan Luke wrote:
"Don Tabor" wrote in message
And if a tree falls in the forest and no one is there to hear it,
there is no sound.
Correct, but irrelevant.
No, that isn't correct. A tree falling in the forest makes sounds
irrespective of whether anyone is able to hear the sound.

I've always read that "sound" is the result of the brain processing vibrations
transmitted by the aural organs, and that vibrations are nothing more than
that: waves in the medium.

There are plenty of these vibrations around us all the time that we don't
perceive. When do they become sound?

It's mostly a semantic argument, I suppose.


Sound has many definitions, but most include something like this which
speaks of vibrations in some medium. Detecting the vibrations isn't
required in order for them to exist.

http://www.thefreedictionary.com/sound

If you close your eyes so that you can't see the sun, does that make the
sun disappear from existence?

That was my point. The absence of thermometers and meteorologists is
not a reason to deny the Medieval Warm Period occurred, there is
plenty of archeological and other proxy evidence that it did, and that
it was throughout the Northern Hemisphere, not just a local European
event.

There is also no evidence that the rise was any slower than the
current increase. That is just assumed.

Don


Virginia - the only State with a flag rated
"R" for partial nudity and graphic violence.