You'll also notice that cold readers gain all their information from the subject themselves. Rather than make bold statements such as "Your grandfather Bill is here with me and would like you to give his police captain's hat to your daughter Jenny", the cold reader will ask questions like "Whos birthday is in July" and wait for the subject to search their minds for someone who has a birthday in July. The subject then gives the "psychic" information.
Other times, they simply throw out random information and wait for the subject to validate it for them. "I'm seeing bees. Like honeybees?"
What does this mean? Did the subject or someone they know get stung by a bee? See a bee? Eat Honeynut Cheerios for breakfast?
Maybe the "medium" really is being shown a vision of bees by the echo of a dead person's spirit. Or maybe they lying. Or maybe they really do see bees caused by delusion. I know which one I believe is more likely than the rest.