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|    talk.origins    |    Evolution versus creationism (sometimes    |    142,579 messages    |
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|    Message 142,565 of 142,579    |
|    RonO to MarkE    |
|    Re: Why evolution won't work (fitness la    |
|    22 Feb 26 21:13:20    |
      From: rokimoto557@gmail.com              On 2/22/2026 6:52 PM, MarkE wrote:       > On 23/02/2026 3:18 am, RonO wrote:       >> On 2/22/2026 12:32 AM, MarkE wrote:       >>> Evidence is emerging that Dawkins' "Mt Improbable" is not Mt Fuji but       >>> rather "rugged in all directions" [1]. Neat textbook depictions give       >>> way to the reality of a "lack of viable evolutionary pathways among       >>> the major optima."       >>>       >>> Beneficial mutations do not work together, rather, "individually       >>> beneficial mutations are often mutually incompatible, leading to       >>> ruggedness on the fitness landscape."       >>>       >>> This is at the molecular level with an empirically determined       >>> ribozyme fitness landscape. The paper's conclusion?       >>>       >>> "Nevertheless, in the absence of such mechanisms, the emergence of a       >>> globally optimal sequence is likely to result from chance events       >>> rather than natural selection."       >>>       >>> An appeal to chance of this magnitude is a deal-breaker: "We can       >>> accept a certain amount of luck in our explanations, but not too       >>> much." (The Blind Watchmaker, Richard Dawkins)       >>>       >>> A similar situation applies for proteins: "...an emerging picture of       >>> pervasive epistasis" within proteins [2].       >>>       >>> "Both types of interaction are rampant, but specific epistasis has       >>> stronger effects on the rate and outcomes of evolution, because it       >>> imposes stricter constraints and modulates evolutionary potential       >>> more dramatically; it therefore makes evolution more contingent on       >>> low- probability historical events..."       >>>       >>> Note the "*more contingent on low-probability historical events*".       >>>       >>> While selection acts on the phenotype as a whole, molecular evolution       >>> underlies the process.       >>>       >>> My prediction: this "emerging picture" will continue to build as       >>> evidence against a foundation of Darwinian evolution.       >>>       >>> _______       >>>       >>> [1] Mapping a Systematic Ribozyme Fitness Landscape Reveals a       >>> Frustrated Evolutionary Network for Self-Aminoacylating RNA       >>> https://pubs.acs.org/doi/10.1021/jacs.8b13298       >>>       >>> "...optimization of activity over the entire landscape would be       >>> frustrated by large valleys of low activity."       >>>       >>> "Our results show that the experimentally determined ribozyme       >>> activity landscape exhibits a degree of frustration, as individually       >>> beneficial mutations are often mutually incompatible, leading to       >>> ruggedness on the fitness landscape."       >>>       >>> "...the inability to traverse the landscape globally corresponds to       >>> an inability to restructure the ribozyme without losing activity."       >>>       >>> "The ruggedness of the empirically determined ribozyme fitness       >>> landscape reported here can be described by the Rough Mt. Fuji model,       >>> which is a combination of a smooth 'Mt. Fuji' landscape and the       >>> random House-of- Cards landscape...we suggest that the major [random]       >>> House- of-Cards character found implies a substantial level of       >>> frustration, consistent with the lack of viable evolutionary pathways       >>> among the major optima."       >>>       >>> "The frustrated nature of the evolutionary network suggests that       >>> chance emergence of a ribozyme motif would be more important than       >>> optimization by natural selection."       >>>       >>> "It should be noted that mechanisms that favor greater genetic       >>> diversity, such as recombination, gene duplication, or epistasis       >>> among genes, could enable crossing of fitness valleys."       >>>       >>> That is, a familiar mandatory positive spin, but followed by their       >>> real conclusion:       >>>       >>> "Nevertheless, in the absence of such mechanisms, the emergence of a       >>> globally optimal sequence is likely to result from chance events       >>> rather than natural selection."       >>>       >>> _______       >>>       >>> [2] Epistasis in protein evolution       >>> https://pubmed.ncbi.nlm.nih.gov/26833806/       >>>       >>       >> And Bumble Bees can't fly.       >>       >> Evolution by natural selection has been documented. It happens and is       >> happening. You have to stop denying reality. You have to be a nut       >> job to deny that evolution by natural selection has happened and is       >> currently happening.       >>       >> The reason to believe put up their recreation model to account for the       >> evolution of the anoles lizards in the Caribbean on multiple islands.       >> They claim that the new types of lizards are recreations of some       >> original, and only look like they are related by descent with       >> modification. On islands with some difference in altitude of their       >> coasts and highlands the lizards have evolved two different physical       >> types, that differed from the coasts and highlands, along with other       >> differences between islands. What some researchers did was to cross       >> the two types and make hybrids, and they released the hybrids onto an       >> island that did not have anoles lizards. The hybrids were       >> intermediate in phenotype, but after just a few generations the       >> highland phenotype was reconstituted and predominantly found in the       >> highlands and the coastal phenotype had been reconstituted and was              [continued in next message]              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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