sorry but my notary public is off this week so I cannot offer you documented and certified proof of anything regarding SEO.
But try a few searches in google and see what you get back; try searching for searchengineoptimization and look at the highlighted words - you will see only 1310 results and you will only see the term searchengineoptimization bolded.
Now search for search-engine-optimization and you will get back 547,000 results and you will see that the individual words in the phrase are bolded both individually and as combinations of these words and that the hyphen does not have to be present in the term for Google to recognize the words. Google treats a hyphen as a space and the words between the hypens as individual words.
Not try searching for _ (the underscore character) you will get back 70,200,000 results for all kinds of uses of the underscore.
Edited by Mel, 10 September 2003 - 11:57 AM.