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I wouldn't consider that bias, but rather conformity to the basic guidelines of a discipline, which obviously is expected within any discipline, at least to some degree. If I were to write a paper on a geometrical theory for a math journal, it obviously would not be reviewed by someone who denied the validity of the Pythagorian Theorem, since that person would not be working within the accepted practices of the discipline. Now, you could argue that that is due to a pro-Pythagorian bias, but a less emotional assessment would be that geometry is based on certain principles, and if you deny them you are not doing geometry. Science, too, is based on certain principles, and biological science in particular is based on certain principles, and if you deny them, then you are not doing science.