Does This Person Teach False Doctrine?

Ellen G. White is an interesting woman with a fascinating life story, but I don't believe that she was a genuine prophetess or her writings were inspired. The claimed prophetic hits that she had were weak and can be explained in other ways. Her prediction of the Seven Last Plagues and the Second Coming would occur during the lifetimes of people attending an Adventist conference in 1856 clearly did not happen. While prophecies can be conditional, I don't think it's credible to claim that God would reschedule the 7th plague on the basis of what a tiny number of conference attendees did.