On this Father's Day, a daughter gives her father a self-painted picture that her father has long wished for. The daughter says: "I am giving you the picture that you wished for, and my gift will be a surprise". The father trims and reflects on the truth of this statement.
The statements “I will give you the picture you wanted” and “my gift will be a surprise” are obviously not both true at the same time. This means the father gets the picture he wanted, or he doesn't get the picture he wanted, which makes it impossible for him to predict. This means that the daughter can happily give her father the picture he wanted as a surprise.