One of my favorite shows to watch on a relaxing Sunday afternoon is The Repair Shop I was watching an episode Sunday afternoon where one of the repairs was a 100 year old watch with a leather band. The leather band could not be repaired and had to be replaced. The lady repairing the band was able to create a window in the new band and put a piece of the old band in the window. It got me thinking though if you have to replace parts to repair something, at what point is it no longer the thing you are repairing but a new thing?