Reset Your Knowledge

Being taught badly and being incapable feel identical from the inside. Only one of them is permanent.

Most people have a subject they ended up standing outside of. Maths, usually. Something came up in a classroom twenty or thirty years ago, it didn’t land, the class moved on without you, and from that week forward it stopped being a subject you hadn’t learned and became a fact about who you were.

I’ve been unpicking a few of those at 44 — algebra, coding, how search engines work, how money works. Not out of any love of studying. The rebuild needed them, and “I’m not a maths person” turned out to be a sentence I’d repeated for thirty years without ever once testing it.

Schools teach one topic at one pace to thirty people at the same time. If the day they explained fractions was a day you were ill, or distracted, or simply thirteen, then everything built on fractions afterwards had a hole underneath it. You didn’t fail to understand it. You were assembling a building on a floor that never got poured.

Adults have advantages children don’t. You choose what to learn and why. You can say “I don’t understand that” without it costing you anything socially. You go at your own pace, and you stop when it’s landed rather than when a bell goes. The reason relearning something as an adult so often works isn’t that you got cleverer in the intervening years. It’s that the conditions were finally right.

The mechanism this pillar runs on is spaced repetition, and it’s the least glamorous useful thing I know.

Reading something ten times in one evening feels like effort and produces almost nothing. Returning to it five times across a month — the next day, three days later, a week, a fortnight, a month — produces retention that lasts, in less total time. The forgetting is the point. Retrieving something you’ve half-lost is the bit that fixes it in place; re-reading something you still remember mostly just feels productive.

The Return Ladder here does the date arithmetic and tells you what’s due today, because the failure mode of spaced repetition has never been the theory. It’s forgetting which day you were supposed to come back.

I don’t learn by reading theory first. Instruct, see what happens, adjust, repeat — most of what I’ve picked up came from breaking something and working out why.

So the material here explains things the way I’d want them explained. If a piece can’t survive being read by somebody who was told at school they weren’t clever enough for it, then it hasn’t been written properly and it doesn’t go up.

If there’s a specific subject you were written off in, start with learning as an adult when you were told you couldn’t. It’s about the mechanics of the write-off more than any one subject.

If it’s maths in particular, there’s a piece on exactly that, and it starts further back than most guides are willing to.

If you already know what you want to learn and it simply isn’t sticking, skip the reading and go straight to the Return Ladder.

Learning things sits alongside money and fitness here for a specific reason, and it isn’t self-improvement for its own sake.

When the debt clears, the pressure comes off — and that’s precisely the moment the old cycle used to restart, because the money that had been going to debt suddenly had nowhere to be. Knowing what’s on the other side is what stops that. The behaviour doesn’t change when the debt goes; only the destination does. That understanding is a knowledge problem, not a money one.

The same applies more widely. Most of the money mistakes I made weren’t discipline failures. They were things I didn’t understand and had decided I was incapable of understanding — interest, compounding, what a pension actually is. Every one of those turned out to be learnable in an afternoon by somebody willing to admit they didn’t know.