## What to expect

The history of boolean logic and how it links to computer architecture.

Hear about George Boole but also Mary Boole, the development of the transistor and silicon logic gates, Claude Shannon and why two’s complement binary numbers are used.

An old joke about logic goes like this: A Mathematician, a Physicist, and an Astronomer were travelling north by train. They had just crossed the border into Scotland, when the Astronomer looked out of the window and saw a single black sheep in the middle of a field. “All Scottish sheep are black,” he remarked. “No, my friend,” replied the Physicist, “Some Scottish sheep are black.” At which point the Mathematician looked up from his paper and glanced out the window. After a few second’s thought he said blandly: “In Scotland, there exists at least one field, in which there exists at least one sheep, at least one side of which is black.”

## References

Refs for Logic…

[110] https://www.allaboutcircuits.com/textbook/digital/chpt-3/logic-signal-voltage-levels

[111] https://en.wikipedia.org/wiki/A_Symbolic_Analysis_of_Relay_and_Switching_Circuits

[112] https://student.craigndave.org/videos/slr-15-boolean-algebra

[113] http://the.computing.cafe/a726981f

[114] https://www.inf.ed.ac.uk/teaching/courses/inf1/cl/tools/venn/

[115] https://www.rigb.org/christmaslectures08/html/under-the-surface.htm

[116] http://www.minecraft101.net/redstone/redstone-logic.html

[117] https://www.instructables.com/Logic-Gates-in-Minecraft/

[118] https://www.allaboutcircuits.com/projects/how-to-build-your-own-discrete-4-bit-alu/