Comment Re:Science creates understanding of a real world. (Score 1) 770
And yet no one believes in phlogiston anymore. Science did what it was supposed to do.
I can think of plenty of examples of the old guard trying to hang on to discredited ideas. The Out of Africa theory of human origins, when it first came out, flew in the face of a general view among European experts that modern humanity had evolved in Eurasia. The old guard, to some extent, were more informed by racial biases (the very 16th-19th century idea that sub-Saharan Africans were somehow lower on the evolutionary chain), and indeed there were a few angry bastards, notably on the Continent, that clung to the idea of a Eurasian origin of H. sapiens even into the 1980s, when finally enough molecular data had been gained both from extant human populations and from the remains of ancient humans (including Neanderthals) that it became irrefutable that modern H. sapiens had a very recent origin (sometime between 200,000 and 150,000 years ago) in Africa.
And again, on the same general topic, for a long time the idea that modern humans and Neanderthals had interbred was viewed as completely invalid. mtDNA studies were flung in the faces of researchers who insisted that modern humans and Neanderthals had interbred in Eurasia. Those that insisted that the interbreeding had happened were tut-tutted, in some cases viewed almost as hippies. Indeed, even into the 1990s, the "consensus" view was that any interbreeding was so rare as to have had no impact on the genetic makeup of modern human populations.
Well, lo and behold, by the 21st century, better techniques for DNA extraction and genome mapping revealed that virtually all human populations outside of sub-Saharan Africa did have nuclear genes that came from Neanderthals.
So it strikes me that this, and numerous other examples, consensus that does not fit the evidence is always ultimately discarded. But that some consensus views are wrong does not mean all consensus views are wrong.
I can only agree with you for the most part, science did what it was supposed to do but how many times and for how long has the old guard held up progress? Of course one can't generalize about all consensuses being wrong but it still happens often enough that erroneous consensuses are imposed by force. Regarding the whole debate about Neanderthal/Cro-Magnon interbreeding I actually saw Ian Tattersall claim interbreeding was impossible (I'm using the non scientific term Cro-Magnon because it's less clumsy than early-modern-human). Tattersall also wrote an entire paper in 1999 find where he dismissed the Lagar Velho child as a hybrid and then admitted on film in a documentary in 2002 that he hadn't even seen the actual skeleton. This issue is a good example of a consensus being imposed on a community by the old guard, progress in the field was held back for years and the word of Tattersall and his peers would probably still be law if they hadn't been caught off guard by scientists from another discipline with irrefutable evidence. Tattersall is now quite busy eating crow. Science did what it was supposed to but with an agonizingly long hiatus of limited progress. One can say what one wants about the way Trinkaus and Zilhao reacted to Tattersall's 1999 paper but they have been proven right about interbreeding. The only thing that remains for them to be completely vindicated is if somebody actually manages sequence DNA from the Lagar Velho child and proves conclusively that it was a hybrid.