Yep, a somewhat related example is how statistical analysis of Mendel's seed data [1] revealed that some bias crept in because its too perfect. In Mendel's case he was right about the genetics of inheritance (and the bias likely unconscious), which goes to show even when we're dedicated to the truth our capacity for self-deception exists.

[1] http://blog.thegrandlocus.com/2016/04/did-mendel-fake-his-re...