I assumed since it was invisible to me , it was invisible to everyone . This is also probably a form of confirmation bias . Actually this might be related to another cognitive bias people exhibit - what I call the I ' m Special bias . Basically , I think asking people why they do things is pointless - they do n't know and , worse , everyone in the world believes they are special .

Question: Why is the narrator suceptible to confirmation bias ?
Answer: Because they were conducting an experiment .None of the above choices .Because the point was invisible to them .Because they believed in themselves .