... If you were to show Eric's first photo in this thread to someone who was not familiar with photos in general and knew nothing about photography, such as a young child from a remote village or even an adult* in that remote village, such a person would express certainty that the buildings on the left and right of the image are leaning...
And you showed them a mirror, they'd think you are the devil himself
* Didn't realize you live in a remote village and know nothing about photography. It is all much clearer now