John Lesoine
I build tools that test whether writing deserves to be believed. Since 2012 I've been a systems engineer in semiconductor metrology, building machines whose entire job is to report numbers you can trust. Sentences deserve the same test.
Book
My AI Lied to Me
Ship a Working App, Make the AI Prove Every Step, and Never Babysit a Chatbot Again
How to make a coding assistant prove its work so you can ship the app instead of babysitting it. You build one real app, chapter by chapter; every file in it was run before it was printed. Out now on Amazon.
Now
- Engineering Persuasion — I find the sentence on your page a skeptical buyer won't believe, fix it, and measure whether the number moved. The first read is free: send me the page.
- Believability — an iPhone app that runs the same three checks on any copy you paste or share to it, on-device. In development.
Writing
Long-form on Substack · shorter and rougher on X · the book's one-page checklist is free.
Contact
john@johnlesoine.com — email works; I read it.