I recently demonstrated to a colleague some irrefutable proof (bar a literal confession from the CEO) of how the public organisation I work for is on some levels, financially operating in the best interest of its board members and not that of the public who fund it. Said colleague is incredibly loyal to the organisation and refused to see what I was presenting. It made me wonder whether anything, even the CEO/CFO explicitly admitting to what I'd shown her, would make her change her mind or whether she would hold her beliefs no matter what.
So I'm interested to ask a wider community: if (and I'm using this because it is probably the best known example, I'm not claiming anything about it) the conspiracy theories surrounding the likes of something much bigger such as 9/11 (or any other global level incident) were to be true after all, what would it take for you to believe it? Would anything even alter your beliefs?