In 2013 I scanned fifty random photographs from my collection.
I uploaded them to Facebook.
Facebook's software created a series of diptych and triptych combinations.
Faces of people, many of whom have never met, were grouped together.
Associated by a facial feature, face shape, expression or head tilt - perhaps?
I made a series of screenshots and then deleted the photos from Facebook.
Today I printed and rephotographed each grouping.