30 June 2026

Goodhart goes to bed!

This BBC article caught my eye. It resonated strongly with my own experience. I would be curious to hear from others who use sleep monitors – has your experience been similar?

I used to monitor my sleep religiously. Every night, I wore my Apple Watch to bed. Every morning, I would wake up and check not just how long I had slept, but also the quality of that sleep. I did this for years.

Fun fact: if you sleep for a really long time—something like twelve hours—you can actually earn a “blue ring” on the Apple Watch. Ask me how I know…

It got to the point where I would wake up, squint at my watch before I had even put my glasses on, and immediately decide whether I felt energetic or tired based on whatever number it showed me.

Then one day, I began to suspect that Goodhart’s Law might be at work: when a measure becomes a target, it ceases to be a good measure.

So, about a year ago, I decided to run a little experiment.

(I can be incredibly nerdy when the mood strikes.)

I kept a pen and paper on my bedside table. Every morning, before looking at my watch, I forced myself to ask one simple question: Do I actually feel well rested? I wrote down my answer.

After a month, I downloaded all the sleep data and compared it with my notes.

There was absolutely no pattern.

In fact, on several days, the two completely contradicted each other.

I kept the experiment going for another two months, just to make sure.

The one conclusion I came away with was this: my feeling of being well rested (or exhausted) was being governed almost entirely by what the sleep monitor told me—not the other way around.

That was the day I stopped wearing sleep monitors altogether.

I also retired my running watches.

For the last nine months or so, I have been trying to do something much less scientific and much more difficult: listen to my own body.

I’m still learning. But I don’t miss the gadgets at all.

Instead, I now have a wrist bracelet made from bike chain. I tell myself I look way cooler now 🙂

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28 June 2026

My Chess Rating Took a Hit. My Dad Rating Went Up.

One of the unexpected joys of having Nikita home this summer is that we get to squeeze in a game of chess most evenings.

Earlier this week, I told Sharmila that Niki’s game is steadily improving. Mine, on the other hand, seems to have reached a plateau. I told her it was probably only a matter of days before Nikita beat me for the first time.

Well… Today was the day.

For over an hour, we battled it out. In spite of numerary strength I had on the board, she outfoxed me with some quick left flank moves with a queen-rook combination.

I’m pretty sure this is only the beginning. Soon she’ll be beating me regularly, and before long she’ll probably start offering me “helpful suggestions” after every game. (Children can be wonderfully generous that way.)

Ah well! If we leave this world in smarter and more capable hands than we found it, we must have done something right!

28 June 2026

Sunday morning puzzle

Which of the following statements – if any – is/are true? How do you logically work it out?

1. Exactly one statement in this list is false.
2. Exactly two statements in this list are false.
3. Exactly three statements in this list are false.
4. Exactly four statements in this list are false.
5 Exactly five statements in this list are false.
6. Exactly six statements in this list are false.
7. Exactly seven statements in this list are false.
8. Exactly eight statements in this list are false.
9. Exactly nine statements in this list are false.
10. Exactly ten statements in this list are false.

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27 June 2026

Book Review: Algorithms to Live By – by Brian Christian and Tom Griffiths

This book was recommended to me by my friend Sunjay Talele. The title seemed vaguely familiar when he mentioned it, but I had never actually read it. I fixed that oversight this month.

If you have even a passing familiarity with common computer algorithms or statistical and mathematical concepts, you will love this book. It brilliantly demonstrates how many real-life problems have already been solved by algorithms that computer scientists and mathematicians have been studying for decades. The fascinating part is that we often end up applying these algorithms instinctively, without even realizing it. The flip side is equally intriguing: if we actually understood the algorithms, we might make even better life decisions.

Take the “optimal stopping” problem. Imagine you’re evaluating candidates and trying to make the best possible choice. The catch is that once you pass on someone, they’re gone forever. But you also don’t want to stop too early and miss an even better option. This applies to dating, hiring, buying a house—you name it. When should you stop, and what strategy should you follow? (Math and computer science folks will recognize this as the famous 37% Rule.)

Or consider the Explore vs. Exploit problem. Exploration opens up new possibilities. Exploitation lets you capitalize on what you’ve already discovered. The question is: when do you stop exploring and start exploiting?

The authors make an interesting observation here. Humans take an unusually long time to become fully independent. Most birds and animals are ready to fend for themselves remarkably soon after birth. Humans, however, spend years under the protection of parents and their community. That extended childhood gives us a long, safe period to explore before we have to exploit our knowledge — a luxury that arguably contributes to our extraordinary adaptability.

When discussing sorting (and searching), the authors point out an amusing fact about the animal kingdom. “Sorting” is usually accomplished through size or outright fights. Humans, fortunately, have developed other mechanisms. So, much as we complain about the “rat race,” we should probably be glad it’s a race and not a fight that determines our social order!

Similarly, while discussing scheduling algorithms, the authors tackle one of the most universally despised aspects of professional life: meetings. Surprisingly, they make a compelling case that without regularly scheduled meetings, our work lives would actually be worse. Planned meetings are one of our best defenses against constant interruptions and unplanned context switching.

By far my favorite chapter was the one on overfitting. In fact, I was so struck by it that I photographed one of the pages and sent it to several colleagues at work. As we’re all trying to make sense of AI’s impact on our workplace, these lines resonated deeply with me:

“As a species, being constrained by the past makes us less perfectly adjusted to the present we know but helps keep us robust for the future we don’t.”

And this gem:

“A bit of conservatism, a certain bias in favor of history, can buffer us against the boom-and-bust cycle of fads. That doesn’t mean we ought to ignore the latest data either. Jump toward the bandwagon, by all means-but not necessarily on it.”

Speaking of fads, did you know that before kale became a “superfood” sensation around 2013, the single largest purchaser of kale was Pizza Hut? They used it in their salad bars—not as food, but as decoration!

The book also left me with one wonderfully thought-provoking question:

“If all jobs paid exactly the same, what job would you do?”

I wholeheartedly recommend this book. The authors have written it with plenty of humor and an engaging style that almost anyone would enjoy. But if you have even a passing interest in computer science, mathematics, or statistics, I suspect you’ll enjoy it even more.

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26 June 2026

Health Tip: How I Finally Solved My Dehydration Problem

As an inveterate coffee drinker by day and a wine drinker by evening, I spend most of my life in a “lightly mummified”. Add to that our salty and spicy Indian food, and I am about as hydrated as a Bedouin crossing the Sahara.

Of course, I am aware of the wisdom of drinking eight glasses of water during the day. Knowledge, however, has always had only a passing acquaintance with my actual behavior.

That said, I believe I have finally solved my problem. And you can too.

First, if you don’t know how to swim, excellent. You’re already halfway there. If you do know how to swim, I recommend unlearning it first.

Then, and this part is important, sign up for swimming lessons with a relentlessly persistent instructor.

The results have been astonishing. I am now ingesting water at an unprecedented rate. Not all of it through my mouth, mind you, but hydration is hydration.

Frustratingly enough, there is one unexpected side effect.

Instead of floating gracefully, I seem to be using all that extra water as ballast in a submarine. I think I am one periscope and a sonar device short of being able to swim underwater.

On the bright side, I am stepping out of the pool more like a grape and less like a raisin!