REVISIT SERIES - An updated post from August 2015 Recently I was berated on Facebook for appealing to authority. As it may not be obvious to everyone why this was a put down (as the picture makes clear it was), I thought it might be worth looking at the problem with authority in science - and why I wasn't actually falling for this failing. Arguably the biggest issue with Ancient Greek science, an approach that spread its way through most of the medieval period, was the dependence on authority. Just as we still do in law cases, most classical natural philosophy was decided by argument rather than by experiment or analysis. If someone repeatedly won the argument on a topic they were regarded as an authority and in some cases - Aristotle is the most obvious example - considered a source of wisdom on pretty well everything as a result. Hence the infamous suggestion that women had fewer teeth than men because Aristotle said it was so, and no one bothered to check. (Actually I am sure p...
No, not the Magic Roundabout that was a teatime treat on TV many years ago. And not Nikola Tesla either. We are taking about the US electric car company and one of the best-known features of my home town Swindon - our Magic Roundabout. The reason for this post is that Tesla has been doing some testing of fully self-driving cars in the UK, and a test site they have publicised is getting across the Magic Roundabout. We inhabitants of Swindon are rather proud of our ability to fearlessly cross the Magic Roundabout, but it certainly puts an aspect of nervousness into many who encounter it for the first time. What can be scary about a roundabout? Because it isn't really that at all - it is five mini-roundabouts joined together by very short sections of roadway. The diagram alongside shows the layout of the roundabout, and two possible routes for getting from the bottom left road to the right hand one. This is what makes it so much fun. You can go whichever way you like around the whole...