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The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche.
—
David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications
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![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_0.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_1.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_2.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_3.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_4.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_5.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_6.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_7.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_8.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_9.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_10.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_11.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_12.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_13.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_14.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_15.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_16.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_17.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_18.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_19.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_20.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_21.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_22.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_23.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_24.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_25.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_26.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_27.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_28.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
![The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is li — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications](https://quotesread.com/uploads/quotes/0/06/21/62108_29.jpg "The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche. — David Deutsch, The Fabric of Reality: The Science of Parallel Universes--and Its Implications")
