Sometimes testing is like being Sherlock Holmes – You find your clues hidden in plain sight: Where the users scratch their nails; how the application user interface is cobbled together; odd patterns in the error logs….
But seldom without experimenting, seldom without pushing the subject under test or consulting the weather report, time tables – and getting out in the rain, doing some footwork.
They always seems to know better, always asking questions. They are so passionate about the problem solving skills that their standard by default seems arrogant  (but that is usually not on purpose).
This is very clear in the recent BBC TV Series “Sherlock” – that illustrates and mentions their Asperger clearly. Almost on par with the The Curious Incident of the Dog in the Night-Time. Still when they are out solving mysteries they are a hero – if there ever was one. 
1: If your standard is to never be called arrogant, you’ve probably walked away from your calling. http://sethgodin.typepad.com/seths_blog/2014/12/in-search-of-arrogance.html
2: Don’t make people into heroes, John. Heroes don’t exist, and if they did, I wouldn’t be one of them. http://en.wikiquote.org/wiki/Sherlock_(TV_series)
Related: The yardstick of mythical normality, People are people – despite their labels,