Ap Dijksterhuis

speaker
549 appearances 2 recordings 1 series first heard Jun 2026 last heard 7 Sep

Ap Dijksterhuis’s voice in public audio — every appearance, attributed to the second.

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recordings per month · last 12 months
1 · Sep OctJan 26AprJulnow

Recordings per month over the last 12 months — 2 in all, peaking in Sep 2026 with 1.

Appearances

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So here's a riddle.
Every day, water lilies double the surface area they occupy.
And at the start of the summer, there's only one lily leaf in the lake.
After 60 days, the entire water surface is covered.
On which day was the lake half covered with water lilies?
Now, if you hear such a riddle, your conscious mind is inclined to just say, okay, so you start with one lily and then the next day there's two and then the third day there's four.
But this is not going to get you anywhere.
And what you need is insight.
You need this sudden flash where you understand the riddle.
And this is usually...
This usually occurs to you only when you take a little distance first and maybe even, you know, go and take a walk or something.
And then you realize, well, okay, if after 60 days the lake is fully covered and the number of leaves doubles every day, then of course half covered means it's the day before the last day.
It's on day 59.
And if the right answer comes to you,
It comes in a sort of a flash.
It never comes when you approach it very analytically or consciously.
Yeah.
And then understanding the problem by turning it on its head is already the solution.
Because then once you know it, you know it's actually incredibly simple.
Yeah.
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