@ Skeptikitten You totally miss the point. The point is, there is NO MECHANISM whereby an amoeba will eventually over time create a human descendant. NOBODY is arguing that natural selection or speciation or mutations dont occur. The argument is that ALL BIOLOGICAL CHANGES WITHOUT EXCEPTION tend to dilute the genome, leading to increased specialisation, leading to decreased potential to survive further change. Now you can define that as "Evolution" but there is no way a bacteria or amoeba is going to be anything more than a bacteria or amoeba. Because natural selection still works by CULLING the population, DESELECTING those genes not fit for the environment. You on the other hand are saying ah ha! The bacteria is changing! Thats proof for common ancestry! And it just doesn't cut it. And its the fact that your response is typical of "those who should know", that reinforces my creationist position. If the smart people with a vested interest in the idea of evolution can't demonstrate even its logic, let alone the science, AFTER 150 YEARS - then that good enough for me to conclude that Evolution is not a theory but rather a self reinforcing cultural paradigm thats stuck because it creates the illusion that God is unnecessary.