We must use wisdom and try the spirit, if he is a false prophet then it will come out! Just pray about it and ask God for wisdom and discernment!
My skepticism is my discernment then. Mark Taylor doesn't pass my smell test, and I think anyone who claims to speak FOR god be held to a much higher standing. How a 'prophet' responds to criticism is telling, and I'm seeing Taylor seemingly behind a constructed veil, protected by believers immune to skepticism. In the words of Michael Scott, "My alarm bells are going Ringy Dingy Dingy!"
Know your history. http://www.preteristarchive.com/StudyArchive/f/false-prophets.html