There was a terrific example of the little guy being proved right in last week's Guardian. A leading academic in the field of mathematics of happiness, had the smile taken off her face when a Master's student exposed a flaw in her argument. Now the text books need to be rewritten.
This isn't the first time Goliath's of academia have been laid low by a sceptical David. You may recall a not dissimilar case last year when the highly influential, Reinhart and Rogoff, who had supposedly cracked austerity had flaws in their analysis exposed by a postgrad student.
The next time you encounter someone presenting a strong argument for some procurement decision which you don't feel quite comfortable with, I suggest you remember, Brown and Walker - the two Giant slayers of academics - and recognise that even those who expect deference can be wrong and if they are right, surely testing the robustness of the argument is something the CPO should do anyway.