Identical twin sisters accused of cheating on their year-end medical school exams have won a defamation case against the Medical University of South Carolina. The twins, Kayla and Kellie Bingham, were accused of "academic dishonesty" in May 2016 after test proctors reviewed the results of an exam on which their performance was deemed to be remarkably similar. The sisters' identical answers to 296 of 307 questions, including 54 wrong answers, raised alarm bells among university officials, who launched an investigation into the twins' performance.  A school "honor council" alleged the pair "were signaling one another and passing notes," court documents show, and ultimately ruled they had cheated on the exam.  "It was an eight-hour exam during which we exhibited normal test-taking behavior," Kayla Bingham told CBS MoneyWatch.  The Binghams successfully appealed the decision and filed a lawsuit against the university, arguing that for years they had behaved and performed similarly academic