In the thought experiment, you start off with a picture of yourself and stack a photo of your father on top of your photo.
Then, you stack a photo of your father on top of your photo. In the thought experiment, you start off with a picture of yourself.
In the thought experiment, you start off with a picture of yourself. Then, you stack a photo of your father on top of your photo.
In the thought experiment, you start off with a picture of yourself. Then, you stack a photo of your father on top of your photo.