Comment by eieio

Yeah I'm sure I've fumbled some details here (sorry!) - I'm searching for this story again and haven't found it, but have found a few things about draft techniques that use print sheets[1] that focus on what you describe - reasoning about the original pack based on the current contents. The technique is pretty interesting!

[1] https://imgur.com/a/how-to-use-print-runs-to-gain-advantage-...