The problem with all of this is you have to correctly assess their "expected bias". And this assessment is, in turn, affected by your own bias which you have no

The problem with all of this is you have to correctly assess their "expected bias". And this assessment is, in turn, affected by your own bias which you have not considered in your analysis. Given this, it seems easy to fall into the trap of just accepting whatever already fits your narrative and discarding the rest.