id author title date pages extension mime words sentences flesch summary cache txt cord-016062-h4vjkufn Gontier, Nathalie Evolutionary epistemology and the origin and evolution of language: Taking symbiogenesis seriously 2006 .txt text/plain 12419 576 49 Given this minor role that natural selection plays within evolution, it is too short-sighted to only develop general normative frameworks based upon Neo-Darwinian theory to study all of life's phenomena. Again, we need to be more cautious with our definition: vertical evolution at the animal level implies that two members of the same species, of the opposite sexes, mate, and that during this mating process, one sex cell from each parent merges with the other to form a fertilized cell, from whereupon an embryo develops. Since it mostly only involves the passing on or recombining of existing genes, I prefer to call this a form of horizontal evolution contrary to regarding this as part of the process of individual variation that occurs because of vertical genetic recombinations without there actually being vertical evolution (because no species evolves or goes extinct). ./cache/cord-016062-h4vjkufn.txt ./txt/cord-016062-h4vjkufn.txt