Lex Fridman PodcastJed Buchwald: Isaac Newton and the Philosophy of Science | Lex Fridman Podcast #214
At a glance
WHAT IT’S REALLY ABOUT
Jed Buchwald Reexamines Newton, Paradigms, and Limits of Scientific Knowledge
- Jed Buchwald discusses how science actually develops, challenging Thomas Kuhn’s neat notion of paradigm shifts by emphasizing messy, practice-based progress driven by new tools and techniques. Using historical cases—especially optics, Newton’s mechanics, and 19th‑century physics—he shows that theories often win not because rivals ‘fail’ but because they enable more novel experiments and devices. He explores Newton’s life, personality, religion, alchemy, and extraordinary productivity, contrasting him with later figures like Einstein and reflecting on whether science can ever fully ‘know’ reality. Throughout, Buchwald stresses the mediated, instrument-driven nature of scientific knowledge and the complex role of data, measurement, and human perception in building theories.
IDEAS WORTH REMEMBERING
5 ideasScientific revolutions are rarely clean breaks; they emerge from new practices and tools.
Buchwald agrees paradigms exist but argues theories often change because new mathematical frameworks and instruments enable novel phenomena and devices, not simply because anomalies ‘falsify’ old theories.
Competing theories can often both ‘work’ but differ in generativity.
The Newtonian particle theory of light could be patched to explain many effects, but wave optics (e.g., Fresnel) generated new predictions, devices, and experimental avenues that Newton’s framework could only accommodate after the fact.
Great scientists are embedded in communities and inherit partial solutions.
Buchwald emphasizes that figures like Newton and Einstein build on prior work—correspondence with Hooke influenced Newton’s mechanics, and earlier mathematicians prefigured aspects of calculus—so lone genius is only part of the story.
Measurement and ‘data’ are historically contingent practices, not timeless givens.
Early modern scientists like Huygens typically chose a single ‘best’ measurement rather than averaging many; statistical methods and the idea of aggregating noisy readings emerged only later, changing what counted as reliable data.
Our access to reality is always mediated by perception and instruments.
Using examples from vision (human vs dragonfly, screen pixels vs ‘documents’), Buchwald argues against strong realism: science corrals aspects of nature through devices and math, but we cannot be certain we’ve reached the ultimate ‘bottom turtle’ of reality.
WORDS WORTH SAVING
5 quotesIt’s not so much that the prevailing view can’t crack something as that it doesn’t give you the opportunity to do new stuff.
— Jed Buchwald
Our access to the inner workings of nature is inevitably mediated by what we can do with the materials and factors around us.
— Jed Buchwald
You are, in fact, a figment of my imagination.
— Jed Buchwald
The role of fruit in the history of science has been vastly exaggerated.
— Simon Schaffer (quoted by Jed Buchwald)
I think there is little question that his conviction that you can figure things out has a fair bit to do with his profound belief that this rule maker doesn’t do things arbitrarily.
— Jed Buchwald (on Newton and God)
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