"State laws in California, Connecticut and New York require educational institutions to find against students or personnel accused of sexual misconduct unless they can prove the accuser gave “affirmative consent,” meaning a positive manifestation by words or actions of consent to each sex act during an encounter. In practice, as Janet Halley of Harvard Law School has noted, these statutes authorize “proceedings in which the decision maker effectively presumes guilt and requires the accused to disprove it.”

(http://www.autoadmit.com/thread.php?thread_id=4321494&forum_id=2#38673075)