Methodological Pluralism
Methodological pluralism is the position that no single research method is universally valid, and that the complexity of the systems we study demands a diversity of approaches. It is not the lazy tolerance of 'all methods are equal' — that is methodological anarchism, and it is false. It is the stronger claim that different methods capture different projections of reality, and that the integration of these projections is itself a source of knowledge that no single method could generate alone.
The Triangulation principle in the social sciences — using multiple methods to study the same phenomenon — is a practical expression of this position. But methodological pluralism goes further: it claims that the incommensurability between methods is not merely an obstacle to be overcome but a structural feature of complex systems themselves. The fact that ethnography and econometrics produce different pictures of the same market is not a failure of method. It is evidence that the market is a multi-scale system that cannot be captured by any single observational frame.