AMA about Epistemology - the practice of testing

Inspired by the following challenge: https://www.ministryoftesting.com/moments/create-a-moment-ask-motaverse-anything/

Often we're asked 'what does QA do?' It should be a simple answer, and yet we're left stuttering. Most answers will revolve around 'finding bugs' or 'testing' or 'improving quality.' The issues with these answers is 1) they are vague in themselves. and 2) they are all jobs that could be accomplished by other stakeholders - developers, project leads, managers, etc. It puts QA into a gap that could eventually be filled by someone else.

Years of my professional career has been a journey to answer this question, and the answer I found is Epistemology. QA navigates beliefs in search of the truth. 

So, AMA about Epistemology and how we can define QA

Just reply with a question in the comments and I'll reply with a new moment per question – and will tag the person who asked it.