3 sources behind this chapter. Each one carries a note on what it is doing in the argument.
The source behind the Target pregnancy-prediction story, used to show how ordinary shopping data can reveal something intimate before a person has chosen to say it aloud.
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Duhigg, Charles. "How Companies Learn Your Secrets." New York Times Magazine, 19 February 2012. (Target pregnancy prediction story)
The legal backdrop to the chapter’s discussion of personal data: collection must have a lawful basis, a stated purpose and limits that do not vanish because a system can infer more.
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General Data Protection Regulation, Regulation (EU) 2016/679. (Referenced generally in discussion of data protection principles)