What I came to understand, and I've seen it pop up over and over, no where more frustratingly than in science where, once a scientist feels she/he is onto something new/breakthrough, it becomes nearly impossible to shift them off of their band wagon [the 'multi-verse' and the pre-Big Bang 'infinitesimal point containing all matter and energy in the cosmos' are my favourites with 'believers' in the former giving in to our complex human brain's tendency to conjure up titillating explanations for what is currently inexplicable (called 'religious beliefs' in non-scientific circles) and the latter being a similar error in allowing the elegance of mathematics to override common sense]. Like religious converts who shout "YOU'VE OFFENDED MY 'BELIEFS'! YOU MUST DIE!" (okay, usually without the last bit ;-), these otherwise calm and level-headed scientists -- who otherwise do base their careers on rigorous scientific methodology -- suddenly become extremely heated, defensive and often just a tad irrational (hands clamped tightly over ears while humming loudly) when their 'pet theory' is challenged.
[Interestingly, despite being two different worlds, what is similar in the individuals who become significant and well-recognized successes (personalities) in academia and new businesses (e.g. Carl Sagan & James Dyson, Richard Dawkins & Richard Branson, etc.) is that the KPI's (key performance indicators) that lead to success are very similar. It is the same type of high-IQ, cross-specialty expertise/adaptability, articulate, failure-resilient, highly-focused, evangelists for unique-point-of-difference concepts, who tends to rise to the top in both fields. In both worlds the individual must 'fall in love with' her/his pet theory/new product or service and 'own it' better than any competitor. The notable differences between the two fields is that, in academia, the new business