Emerging Technologies › Robotics and Hardware · Feature · Practical STEM, Part 8
True or false: how a self-taught teacher's logic became the language of every chip
George Boole turned human reasoning into simple algebra. Decades later, a student realized it could run on switches — and digital electronics was born.
Every app you use, every photo you take and every message you send comes down to billions of tiny decisions: yes or no, on or off, 1 or 0. The rules for combining those decisions were written by a schoolteacher in 19th-century England.
The self-taught mathematician
George Boole was born in 1815 in Lincoln, England, the son of a shoemaker. His family could not afford university, so he taught himself languages and mathematics while working as a teacher. In 1854 he published The Laws of Thought, which showed that logical reasoning could be written as algebra. He became the first professor of mathematics at Queen’s College, Cork, Ireland.
The idea: three simple words
Boole’s algebra uses just two values — true and false — and a few operations:
- AND is true only if both inputs are true.
- OR is true if at least one input is true.
- NOT flips true to false, and false to true.
From these, you can build any logical statement, however complex.
The leap to switches
For decades, Boolean algebra was a curiosity for logicians. Then, in 1937, a 21-year-old student named Claude Shannon wrote a master’s thesis showing that electrical switches could carry out Boole’s operations. Two switches in a row act like AND; two side by side act like OR. Circuits could now “reason.”
Today, a modern processor contains billions of transistors arranged into logic gates that do exactly what Boole described.
Where it runs today
- Every computer chip, from phones to satellites, built from AND, OR and NOT gates.
- Search engines and databases, where you combine terms like “robots AND education NOT toys.”
- Safety systems in trains, aircraft and factories, where logic decides when to stop a machine.
The practical lesson
Boole showed that very simple rules, combined patiently, can express almost anything. He also showed that you don’t need privilege to change the world — only curiosity, discipline and good questions. A shoemaker’s son with borrowed books gave us the grammar of the digital age.
Try it yourself
Your lamp should turn on only if it is dark AND someone is in the room. Write that rule with AND, OR and NOT. Now add: “or if the alarm goes off.” You have just designed a logic circuit.
Sources: Boole, An Investigation of the Laws of Thought (1854) · Shannon, “A Symbolic Analysis of Relay and Switching Circuits,” Transactions of the AIEE (1938) · MacHale, The Life and Work of George Boole (2014).
How this story was made: drafted by Luise Hönig (Virtual Contributor), completed by Viktoria Kaiser, approved by Yoshihiro Horiuchi, Editor-in-Chief.
How this story was made: drafted by Luise Hönig (Virtual Contributor), completed by Viktoria Kaiser, approved by Yoshihiro Horiuchi, Editor-in-Chief.