I only really trust someone’s judgement when I know they’ve changed their mind on something important. Sometimes I’ve said this publicly, and people bristle. Changing your mind isn’t seen as positive. Being right is important, and sticking to things is strong. People like being right, and want to be seen as strong. The important fact, though, is that those two things are opposed to each other. Most people arrive at adulthood with a fairly firm set of opinions about the world....

More than ten years after I left school, my old secondary headteacher rang my parents and asked for me. She had a painting of mine. Back in that odd time halfway through GCSEs, fifteen years old, after mock exams, after the older children had left school entirely, but before the summer holiday, the school had arranged a week of “activities” rather than lessons. I chose to spend the whole week doing art....

Politics has become poisonous. I don’t think it needs to be. Government doesn’t work. I think it can. I have some ideas, and because I have no power and no platform, writing them down here is the best I can do. The positive ideas will be at the end, and it gets negative first. Bear with me. The ideas make more sense with the framing. What do you MEAN, government doesn’t work?...

Why are you reading this? For some reason, in recent weeks I keep bumping into Robert Sapolsky’s ideas. He is certain that you had no choice but to read what you’re reading, because there is no such thing as free will. You may think you chose, but there was nothing doing any choosing. Biologically, you can’t argue either – because of the evidence, not because your actions are predetermined. Whatever you do is caused by neurons firing, which are physical, and work by physical causes, combinations of sensory input, connection between them, environment and history....

Sometimes I annoy people by saying that truth is not important. “Truth” is always either provisional, dependent on formal assumptions, or a matter of faith. It can’t be absolute, and therefore we shouldn’t treat it as an end in itself. As sentient beings, we interact not directly with reality, but with representations and models of reality. More and more, in science, through sophisticated equipment, but at any time through our senses and brain processes....

After I wrote a little essay about life being better without planning, one of those fortunate coincidences occurred, and I found a book called “Why Greatness Cannot Be Planned”. I recommend the book. It may not convince you, but it presents a perspective that even sceptics could usefully consider. It makes the case, from a technical and practical base, that no ground-breaking achievement can ever be achieved by deciding on the steps to get there and working through them....

I regularly mention, when talking about other things, that I am a great believer in “the wisdom of crowds” and democracy in the absolute. And people are regularly baffled. What, I see all the idiots around, and what they vote for, and how all around people say stupid things and are mean and terrible, and wrong … and I think that’s a good thing? I do think it’s a good thing....

Everybody knows you shouldn’t only eat what you like. Whatever it is that you like best, a varied diet is better for you than just that thing, however healthy it may be. Some of the necessary things seem pointless or borderline harmful. Roughage, for example, goes right through you and you get nothing from it. There is strong evidence that some things that are mildly toxic prime your body in useful ways, not to mention that some elements that would be poisonous in large doses are vital in trace quantities....

Here’s my immediate goal: to write an easy-to-read article about the downsides of planning. The correct thing to do is to gather my facts and the points I want to make, organise them. Come to that, given that this is my personal blog, I should fit the whole thing into my priorities for this week. Instead, here I am, just writing it. Which is how I do more things than we’re told is good....

As a child, for some reason I really really wanted to make the best paper plane possible. I tried a lot of fancy designs, most of which were worse than the classic pointy “dart”. Nothing was better than one of the early ones I found, which in the classic form I learnt is made like like this. Fold a sheet of A4 paper lengthways, then unfold it again. With the valley side of the folded paper up, fold the corners of one end to the centre line created by the fold, so that they create triangles at 45 degrees....