A dubious link from a friend. A headline too sensational to be true. A video that seems fake but you can’t be sure. As online misinformation grows harder to detect, new artificial-intelligence tools promise to help us separate fact from fiction. But do they actually work?A dubious link from a friend. A headline too sensational to be true. A video that seems fake but you can’t be sure. As online misinformation grows harder to detect, new artificial-intelligence tools promise to help us separate fact from fiction. But do they actually work?Security[#item_full_content]