PhD on startups @ TU Delft Startup mentor (350+ mentored)

Amsterdam
Joined March 2009
We all know that list of 12 reasons startups fail by CB Insights. But before startups die, they slow down. After mentoring 350+ startups and running 100+ accelerator workshops, I keep seeing these 13.
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Takes like this remind me how narrow-minded tech Twitter is.
We created gyms because modern day work no longer required physical activity. Without exercise, our muscles atrophy. I predict we’ll need gyms for our brains too, once AI starts doing our knowledge work.
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This guy just can't stop.
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This is what me playing around with cool brushes in pirated photoshop 2003 looked like.
We’re sharing a solution to the Navier-Stokes Millennium Prize Problem, one of the deepest problems at the frontier of mathematics. The proof was produced by a group of agents, using an OpenAI next-generation model significantly more capable than GPT-6 Astra. The problem concerns whether the description of smooth three-dimensional fluid motion modeled by the Navier-Stokes equations can break down. It has remained unresolved for roughly 90 years.
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Jeroen Coelen retweeted
We’re sharing a solution to the Navier-Stokes Millennium Prize Problem, one of the deepest problems at the frontier of mathematics. The proof was produced by a group of agents, using an OpenAI next-generation model significantly more capable than GPT-6 Astra. The problem concerns whether the description of smooth three-dimensional fluid motion modeled by the Navier-Stokes equations can break down. It has remained unresolved for roughly 90 years.
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Most founders don't find PMF because they haven't figured out demand. This is not about doing customer interviews. Listen to my interview with Rob Snyder on his new book Power of Pull youtube.com/watch?v=ALQFBXsG…
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Drawing is meditative.
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Many founders ask me: how do I validate product-market fit before going all in on a segment? You don't. It's the other way around. You validate PMF by going all in on a segment and getting easy, repeatable sales as a result, with happy customers. (1/2)
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Most founders are further separated from PMF than they think. Use my PMF Scale to see where you stand. Also now available as a printable (A4) worksheet with checkboxes for workshops. See the link in the comments for free downloads! (2/2) doctormarket.fit/p/measure-p…
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Anyone seeing Sonnet 5 is heavier on token count?
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Why can't Google Gemini design a decent UI?
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Literally my timeline rn
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What I find most unsettling about all the Epstein emails is the horrendous capitalisation and punctuation.
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Jeroen Coelen retweeted
You can’t get anywhere if you always restart.
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Wait emoji SSIDs are a thing?!
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