As to finding someone who doesn't care about the outcome to act as a disinterested party, that generally doesn't happen in critical fields. It's very competitive, and more often than not you will find someone who is just dying to prove you wrong if anything, in the process providing a means to either disprove or validate your findings.
The point is that a person can have a passion for a subject without having a passion for a particular finding based on research of that subject. We can, for instance, have a passion for hematological science without holding a preference for what we'd like facts to lead to in the form of findings (read: conclusions) of hematological research.
As for those "just dying to prove you wrong," that's a good thing! Conclusions of arguments deserve no less.