Entrepreneur. Creator/founder of https://xitter.cf/t.co/Ny67QU6FwN, https://xitter.cf/t.co/A9he5owdGp, and https://xitter.cf/t.co/15CmFgHEzh. Find my published books on https://xitter.cf/t.co/AqFfpd3biG.

Zwijndrecht, The Netherlands
Joined March 2011
The first forecast said aloud pulls every later estimate toward it. Test: pick one deadline. Each person writes the odds of hitting it before anyone speaks. Talk, estimate again, and name the new evidence behind each change. lenvanderhof.com/en/blog/cal…
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A stronger model does not get a pass on your data rules. Test: take one prompt that includes customer or policy text. If that text must stay on machines you control, run it locally or block the call. lenvanderhof.com/en/blog/fro…
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Fluent AI prose can hide an assumption the conclusion needs. CALIBRATE: name the assumption that would collapse the last answer you forwarded, then point to the evidence. No evidence: mark it unverified. lenvanderhof.com/en/blog/eva…
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A model can win on score and price and still fail your job. Capability envelope test: send your longest real input and the output length you need. If the other model cannot take either, it cannot replace yours for that job. lenvanderhof.com/en/blog/wha…
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Calibration is whether your stated odds match what actually happens. Test: pull forecasts you called 80% likely. Did about 80% come true? No log yet? Write one forecast, its probability, and a review date today. lenvanderhof.com/en/blog/wha…
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A link to your page is not the same as being named as the source. Test: ask one question your page answers in three fresh ChatGPT Search chats. For each reply, score two things apart: was the page linked, and were you named? lenvanderhof.com/en/blog/cit…
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An AI agent drafts a pitch. A literary agent is hired to place your book with publishers. Test: write the job in one sentence. If it needs a publisher relationship, hire a literary agent. If it is a draft, use software and leave sending off. lenvanderhof.com/en/blog/lit…
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A chatbot waits for your next prompt. An agent takes the next invoice row without another prompt. Give it a copy of one overdue-invoice sheet and one order: draft a reminder for each row. If every row needs a new prompt, you still do the work. lenvanderhof.com/en/blog/ai-…
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An AI agent with no named reviewer is a demo that can spend money. Pick one system you call an agent. Write the name of the person who can fail its output, and the last date they did. A role, or a blank date, means stop calling it an agent. lenvanderhof.com/en/blog/wha…
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A dashboard score is not answer engine optimization. The job is one page a machine can quote from the opening. Ask the seller which URL they will rewrite this week. A login or a chart means you bought a report. lenvanderhof.com/en/blog/aeo…
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A Google ranking does not prove ChatGPT fetched the page. Pick one ranked URL. Check robots.txt and your access logs for OAI-SearchBot, ChatGPT's search crawler. If that crawler is blocked, fix access before you rewrite. lenvanderhof.com/en/blog/aeo…
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Showing up in an AI answer does not make your page worth quoting. Open one page. Paste its first answer into a blank doc. Can a stranger name the claim, who made it, and where the evidence sits? If not, rewrite the opening. lenvanderhof.com/en/blog/wha…
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More AI agents cannot fix a broken handoff. Give the next agent only the handoff note. Ask it to state the task, the constraints, and the pass/fail check. Match that to the brief. Fix the gaps before you add agents. lenvanderhof.com/en/blog/wha…
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