The possible impossibility of truth and the importance of incorrectness

In the post below on the genetic history of India, or earlier when discussing the revisions of European prehistory, one general trend that is cropping up is that the future seems more complex and muddled than we'd presumed. This introduces the real possibility that in the foreseeable future we won't be able to opine with any credibility about the nature of the pre-literate past, because our tools are good enough to falsify simple models, but not powerful enough to distinguish between the set of more complex models. In contrast, ten years ago when it came to the expansion of farming in Europe on offer we had simple and clear dichotomies; demic diffusion of Anatolian farmers vs. cultural diffusion of farming techniques along trade routes. Ten years ago when it came to India we are mooting the possibilities between elite transmission of Indo-European language, versus demographically significant migrations into South Asia ...