EVIAN, FRANCE — Years after wandering away from a G7 summit, a confused former President Joe Biden was seen wandering back into the G7 meeting in France this week. A gathering of top world leaders was in the middle of a high-stakes debate on global trade when the doors swung open to the conference room, and Biden walked in, seemingly unaware of where he was. The former president strolled past security, flashed a warm smile, and asked French President Manuel Macron if he knew where they kept the chocolate-dipped cones.