.Over 50 woman have accused actor and comedian Bill Cosby of sexuality assaulting them at various time over the past 40 years. Mr. Cosby has threatened to sue the woman for defamation.

In order to him win such a suit, what elements of defamation must prove? Your answer should explain each element as it would apply to Mr. Cosby's suit against an alleged victim. Is he a public figure? Does he need to prove additional elements that a private person would not need to prove? if, so what are they? what is the landmark supreme court case that discusses this issue ?