Deep Optimism
Focus on Foundations is a 501(c)(3) nonprofit. We build learning tools and source-backed AI Q&A, including a math fluency quiz and conversations grounded in David Deutsch interviews.
Ideas & explanations
Explore David Deutsch
Ask questions across David Deutsch’s interviews, follow the quoted sources, and read the conversations in full.
More ways to explore
Practice & discovery
Assess and build math fluency
Practice arithmetic, find the next challenge, and see progress over time. Math Flu brings quizzes, assessment, and guardian tools together.
Prototype applets
Community & public health
Civic & emergency response
Explore local preparedness and public-health archives, with questions and answers grounded in the original meetings and documents.