Just a reminder that the purpose of this discussion aims at stimulating thought and self awareness as tools to help those in recovery from trauma learn how to make safer choices. To make the discussion more jocular, we've defined Cognitive Biases as “CranioRectal Inversions” (CRI).
I think of this as knowing just enough about something to be dangerous. Basically, people – roughly two thirds of people – who lack training in a certain topic grossly overestimate their skill and aptitude by wrongly assuming that they hold mastery of it. They project confidence about it because they're totally ignorant of the fact that they're misguided.