The Book of Why audiobook cover - The New Science of Cause and Effect

The Book of Why

The New Science of Cause and Effect

Judea Pearl and Dana MacKenzie

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The Book of Why
History of Causation+
The Danger of Raw Data+
The Ladder of Causation+
Vital Causal Factors+
Causal Models & AI+

Quiz — Test Your Understanding

Question 1 of 8
Why did early twentieth-century statisticians, such as Karl Pearson, view the concept of causation as scientifically invalid?
  • A. They believed causation could not be proven and therefore could not be represented as pure data.
  • B. They found that causation was heavily dependent on unethical randomized controlled trials.
  • C. They argued that causation was only relevant to Artificial Intelligence, which did not yet exist.
  • D. They proved mathematically that all causation is simply a byproduct of common confounders.
Question 2 of 8
What statistical error is demonstrated by the apparent relationship between a child's shoe size and their reading ability?
  • A. Misidentifying a mediator
  • B. Neglecting a common cause
  • C. Relying on counterfactuals
  • D. Failing to randomize the control group
Question 3 of 8
According to the authors' 'Ladder of Causation', what characterizes the first rung?
  • A. Active intervention and experimentation
  • B. Understanding counterfactuals and asking 'what if?'
  • C. Passive observation, association, and probability
  • D. Identifying the specific mechanisms (mediators) of a reaction
Question 4 of 8
Which Biblical figure is cited in the text as having run one of the earliest recorded controlled experiments?
  • A. King Nebuchadnezzar
  • B. David
  • C. Solomon
  • D. Daniel
Question 5 of 8
Why do computers currently struggle with 'counterfactuals' on the third rung of the Ladder of Causation?
  • A. They cannot process basic observational probabilities like P(floss|toothpaste).
  • B. They are unable to analyze data from randomized controlled trials.
  • C. They treat all necessary causes equally, failing to distinguish between normal conditions and actual catalysts.
  • D. They inherently prioritize confounders over mediators in mathematical formulas.
Question 6 of 8
What is the primary purpose of introducing randomization, such as using placebos, in medical trials?
  • A. To identify the mediator between a drug and its side effects
  • B. To control for confounders, such as the biases of researchers and participants
  • C. To eliminate the need for a control group entirely
  • D. To translate correlations into algebraic equations for AI analysis
Question 7 of 8
In the context of causal relationships, what role does a 'mediator' play?
  • A. It is a variable that influences both the participants and the outcome, skewing data.
  • B. It is a mathematical formula used to calculate statistical uncertainty.
  • C. It is a variable that explains the mechanism of why one factor leads to a particular result.
  • D. It is an active intervention intended to change a passive observation.
Question 8 of 8
How did misidentifying the mediator for scurvy prevention lead to tragedy during the British Arctic Expedition of 1875?
  • A. Doctors believed scurvy was caused by bad tinned meat rather than a lack of Vitamin C.
  • B. Sailors assumed scurvy was hereditary and refused dietary interventions.
  • C. The crew consumed too much fresh reindeer meat, leading to an adverse reaction.
  • D. Researchers relied on passive observation instead of bringing acidic fruits.

The Book of Why — Full Chapter Overview

The Book of Why Summary & Overview

The Book of Why (2018) introduces basic concepts of statistical methods of argumentation and makes the case for a mathematical model of causation. For decades, the mantra “correlation does not imply causation” has been hammered home by statisticians. The result has been stagnation in many forms of research, and this book aims to push back against this trend.

Who Should Listen to The Book of Why?

  • Followers of national news and government reports
  • Social scientists reliant on big data
  • Humanities students looking to break with dominant paradigms

About the Author: Judea Pearl and Dana MacKenzie

Judea Pearl is a computer scientist and philosopher. In 2011, he won the Turing Award, the most prestigious prize in computer science. He is the author of Causality, Probabilistic Reasoning in Intelligent Systems and Causal Inference in Statistics.

Dana Mackenzie is a writer and mathematician. He is the author of The Universe in Zero Words and The Big Splat, or How Our Moon Came to Be.

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