Build it yourself: why making and reinventing beats consuming knowledge
October 5, 2026 · 17 min read
Grant Sanderson on Feynman's habit of reinventing things, Neil Gershenfeld's fab labs, Joe Liemandt's aim of raising builders, Bret Weinstein on consuming versus doing and Immordino-Yang's teachers who reinvent knowledge in front of students all favor producing over absorbing. It gives learners a simple test for any study method: are you making something or only taking it in?
The rules, numbers and steps worth keeping in front of you.
- What you make or work out yourself sticks; what you only take in mostly does not.
- The test for any study method: what did you produce?
- Sanderson: try the problem yourself before reading the solution, for a few core ideas.
- Sanderson: a lecture that feels clear can leave nothing a week later.
- Sanderson: rediscovery costs speed; do not reinvent everything.
- Gershenfeld: people build what they personally want when given tools.
- Gershenfeld: ready, fire, aim: do the homework, try, then study where you landed.
- Liemandt: school was built to create consumers; children need to build.
- Liemandt: teach fundamentals by direct, step-by-step instruction, then build.
- Weinstein: the physical world tests whether you understood.
- Immordino-Yang: great teachers invent the knowledge in front of students.
- Unguided sandboxes are daunting; most people do not experiment alone.
- Reading is fine; consuming with nothing made at the end is the problem.
- Evidence is mostly experience and argument; one school's figures are its own.
This is the short form. The full insight has every expert's reasoning, their own words and the sources.