Don't use tribool unnecessarily in the examples.

[Eelis]

No description provided.

[codecov]

Codecov Report

Merging #1568 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #1568   +/-   ##
========================================
  Coverage    92.61%   92.61%           
========================================
  Files          150      150           
  Lines        12102    12102           
========================================
  Hits         11208    11208           
  Misses         894      894

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[vinniefalco]

we need to search for tribool (including in comments) and make sure each occurrence is justified