“We have a logarithmic view of history because we can't possibly learn and retain everything that ever happened before we were born.
     Seen through this lens, Kurzweil's trends become more suspect. It seems likely that he's confusing a logarithmic view of history for an exponential trend in biological and technological development. His list of biological milestones give this away: rather than picking particularly important events in the evolution of all life on Earth, he's mostly chosen milestones leading up to the evolution of humans, as if humans are the ultimate goal of evolution. (Evolution has no goal, as Kurzweil surely knows.) This kind of cherry-picking makes it easy to create the appearance of an exponential trend.”