Tuesday, 24 March 2026

Seth's Blog : Numbers and the human/computer interface

If you tell me your ID number, your phone number or the wiring instructions for your bank account, not only will I forget them, I'll need you to repeat it a few times so I write it down without making a transcription error. When we first started using ...
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Numbers and the human/computer interface

If you tell me your ID number, your phone number or the wiring instructions for your bank account, not only will I forget them, I’ll need you to repeat it a few times so I write it down without making a transcription error.

When we first started using serial numbers (the Roman Legion did this thousands of years ago, and the British Board of Ordnance required it by law in the 1700s), it made perfect sense. Issue the next number on the list and move on.

But numbers alone are difficult for humans to error check and handle. So we use computers to help. The problem lies in the pesky humans who are still part of the chain.

So, here’s a simple hack. It’s unlikely to catch on worldwide, but I think it’s fascinating enough to consider…

If you had a list of 150 three letter words, all selected to be easy to say, spell and discern, you could use them to replace numbers in a productive and useful way.

So, big bob zap car cat is five words next to each other. There are 75 billion combinations of five words, which means that it replaces a number like 4839450381 with room to spare.

For ATMs that are four or five digits, you only need three words.

Think about that the next time you need to tell a customer service person your order number or serial number, or share a wifi password.

Let the computer do the work.

        

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Monday, 23 March 2026

Seth's Blog : Follow-through

How does the ball know? In tennis, golf or just about all ball sports, the follow-through determines the flight of the ball. Great players always have a complete and confident follow-through. But the ball is long gone before that happens. So, what's the ...
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Follow-through

How does the ball know?

In tennis, golf or just about all ball sports, the follow-through determines the flight of the ball. Great players always have a complete and confident follow-through.

But the ball is long gone before that happens.

So, what’s the point?

It turns out that the ball can tell that you intend to have a serious follow-through. A weak or non-existent follow-through requires that you start slowing down before your racquet ever gets to the ball.

The metaphor should be pretty clear.

If you show up for the audition, your first TEDx talk, your early blog posts, the job interview or your start up hoping to see what happens (“I’ll commit if I get picked”) we can tell.

On the other hand, when it’s clear that you’re going to keep on showing up, it’s an invitation to get aboard now.

Follow-through doesn’t always work. But it always works better than the alternative.

        

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