The metaphysical bus company

To would-be passengers waiting in the bus station with no knowledge of the world outside (no doubt plugged into their phones for safe keeping from whatever reality might be) the arrival of their bus would appear an event occurring without any antecedent cause. "Oh look!", says Davey Hume, "There's my bus! See, I told you it was a logical possibility".

I believe Margot pressed the button on the camera which resulted in this image being formed by some process beyond my very limited ken.

The Weekend in Black and White is here.