Purposefully fudged schematics

[Brad Pritts]

A long time ago I was involved with licensing databases 
(of new and used car price books-- e.g. Edmunds, Kelley Blue Book,
etc.) 

They had the custom of salting the data with a few deliberate
errors so that in the event of an infringement suit,
they could prove that their data had 
been copied by the infringer, rather than independently created.

I can't say whether the same purpose applies to schematics,
but it just might be. 

Brad



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To be certain, some errors/additions are deliberate; Rand McNally 
generally sprikles a few non-existent landmarks in their maps; 

Google satellite maps have "watermarks" that can be very confusing.  
I spied what looked to be clearing on some of my forested land and 
hiked to the very spot and found--trees, just like everywhere else.  
It took some conferring with a USGS employee to discover that what I 
thought was a clearing was a rather subtle watermark (viewed in just 
the right way, you can make out a "Go".