A man while looking at a photograph said, "Brothers and sisters have I none. That man's father is my father's son."
Who was the person in the photograph?
Mike was watching TV and all of a sudden he leaps to his feet and says, "That's Simon", pointing at someone who was at the screen.
Then his brother Mark comes in, looks at his brother, then looks back at the TV and says, "So it is."
How do they know Simon if they hadn't seen him before, no pictures, nothing?