This is a pretty poorly written article, as it starts out with "myths" then goes on to mix various principles in federal and state laws and court cases without explanation.  

This statement is just plain wrong:
"[S]exual harassment cases rest on basis of prima facie and a preponderance of the evidence. Prima facie means "what would a reasonable person conclude?" In other words, what would 12 reasonable people conclude when looking at all the facts?"

There is no such thing as "prima facie."  There is something called a "prima facie case."  That is a list of principles that a party in a lawsuit must prove in order to win their case; each claim in a party's case has a different list of principles.  Many lists of principles are not in statutes but are the result of multiple court decisions.  Some principles require more proof (evidence) than mere preponderance.

A prima facie case of sexual harassment depends on state law, federal law, and court cases.