Reading multiple entries here and a few others onlne, I have noticed people writing about using dirt/soil in their compost piles/heaps/bins. I had never heard of putting either dirt or soil in a composting bin. I can understand using a low fertility blow sand/silt - dirt just to build a bulk or mass that the compost could improve upon, but why add soil? 

 Many sources tell that, "Dirt is dead" and "Soil is alive". That is taking things to an extreme; while I do agree that soil is vibrant, and yet dirt is far from dead because you can improve dirt into soil in a few months. Dead means dead. We need to change the way we word what dirt honestly means.

 So why put either into a compost bin/pile/heap?