Input data accuracy

[MarcoP]

I understand that in the first two plots, the red points refer to the characters following uncertain spaces only, i.e. the increase, converted to a percentage. 

Hi Rene,
I confirm your interpretation of the plots.

As for the scribes, I attach histrograms of the % of uncertain spaces with respect to all spaces (certain+uncertain). Here it seems that there is a great difference between ZL and GC: the ratio is quite constant across scribes for ZL but varies considerably in GC.
I can try making more detailed plots for specific characters per scribe, but comparing things will of course be complicated by the different character statistics for different "dialects".