Actually, it's tough to tell when Obama is lying. He was against the surge before he supported it, loved Wright before he disavowed him, hated Hillary before he loved her, opposed the war before wanting to prolong it, criticized religion while embracing it, etc.
Let me start by telling you the story of two Johns.
John number one went on a day hike with a couple of friends in the Cascade Mountains about an hour from Seattle. He somehow got separated from his buddies and became lost. John was dressed in casual cloths for a warm weather day hike and had nothing but a lunch with him. He spent three days in those mountains and luckily made it out to tell the story.
John number two, a friend of John number one, was much better prepared when...