fullmetalangel said:
ElephantGuts said:
But what is sound if no one hears it? Maybe it only causes vibrations, but they don't become "sound" until they are heard.
No, it's not, sound is exactly that, vibrations in the air. It doesn't matter if anyone hears it or not.
edit: Actually, vibrations in
anything. Solids, liquids, gas, etc.
Dictionary definition: http://www.bartleby.com/61/65/S0576500.html
Shade Jackrabbit said:
A similar argument came up in computer engineering today. Basically things are "true" when the masses of the trusted sources (i.e. scientists in these days) believe something. But they could all be wrong. I mean, why does gravity work? Because people believe it does. Maybe we're just all horribly wrong, and there's some other reason. But we're right because more people believe it to be true than not.
As much as I hate to disagree, last time I checked, scientists weren't sure how gravity worked, so your example is moot.
That's why they are called theories. People who accept theories as facts are in for a surprise.
You have a hypothesis and then you add in a probability of error. The purpose of science is an ongoing study where you examine new evidence that comes into light, then re-evaluate your theory.
As far as gravity goes, everyone knows it exists. It's not a crazy notion that you can debate away with unwieldy rhetoric about perception. Objects with mass attract each other. We know this. What we don't know is the number of factors involved, only the ones we've examined to date.
To say that we don't know therefore, maybe it's an illusion, is about as asinine as me arguing with a traffic cop that I wasn't speeding, I was simply moving through life like dust in the wind. Even if you have a point, you're still going to get a ticket. That my friend, is called reality.