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[postlink]
http://science-video.blogspot.com/2011/06/to-edge-of-time.html[/postlink]
http://www.youtube.com/watch?v=h_IiiEF4rGwendofvid
[starttext]
Like a lot of other words, the word "theory" has multiple meanings,
just like bat, bowl, row, etc. In colloquial use, a "theory" is a
guess. When used in science, a "theory" explains a set of facts. And
in science, a guess is called a "hypothesis."
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