IF enough people believe it, or if it is illegal not to believe it, will it be true?
I spend a lot of my time, probably too much, waging a battle of wits and reason with the truly and irredeemably unreasonable. The usual subject is the scientific theory of evolution. I preface the noun “theory” with scientific so as there is no mistaking exactly what we mean by theory.
Whenever I hear the words “Just a theory….” levied at a scientific theory, it sends a shudder down my spine. As I’ve mentioned before, and I will undoubtedly continue to do so, a scientific theory is not speculation or opinion, it is a comprehensive, logical and above all testable model that represents the best means of explaining the evidence. Furthermore it facilitates predictions that can be tested experimentally to continue to verify the reliability of the theory. The theory of evolution is just such a theory:
The theory of evolution explains that variation exists between individuals within a species, it explains how natural selection can act to drive this variation and it shows how, and describes why, some organisms display characteristics that make them better suited, i.e. fitter, for life in the environment in which they live. It explains how these “fitter” organisms are the ones more likely to survive and pass on their characteristics to offspring. It explains how, over time, these characteristics become a trait in all members of a species, and how less favourable characteristics can be lost. Ultimately, the theory of evolution explains how a species, over this long period of time and subject to much genetic change steered by natural selection, can be very different from its ancestors.
Now, the above paragraph is qualitative, and largely non-technical. However, bound up within the above is some impressively complex science. The debates that rage amongst scientists is not about the validity of the above, it’s about the specifics of how they’re achieved. Part of what I aim to do with this blog is not re-write any of the perfectly excellent books on evolution that are available, but to tackle those areas that are taken advantage of by religious fundamentalists. Science is a dynamic subject; by the time it is written up in a book, it is already out of date. As I mentioned before, there is a battle of wits going on out there, between scientists or other such rational free-thinkers, and religious fundamentalists (which for want of a better term, I call “Fundies”).
Continue reading ““Two plus two makes five” – Winston Smith, 1984.”