The scientific attitude of humility is most likely to be undermined by

The scientific attitude of humility is most likely to be undermined by "the Hindsight Bias".

Hindsight bias is a term utilized in psychology to clarify the inclination of individuals to overestimate their capacity to have anticipated a result that couldn't in any way, shape or form have been anticipated. Generally, the insight into the past inclination is similar to stating "I knew it!" when a result (either expected or startling) happens – and the conviction that one really anticipated it accurately.  

a is the final ! : )