10.24 Unfolding of Ideas and Events Worksheet

[1] Digital archives face a quiet enemy: time. [2] The author explains "bit rot" as gradual data corruption and notes that storage media can fail long before a century passes. [3] But the deeper problem is not only hardware. File formats and software change, so a perfectly preserved file can become unreadable if no program can open it. [4] For that reason, archivists treat preservation as a cycle: they check integrity, migrate formats, document metadata, and then repeat, because each migration introduces its own risks. [5] The piece concludes that permanence is achieved not by freezing data in place, but by organizing ongoing work around predictable decay.

[1] The concept of induced demand is often reduced to a slogan: "more lanes make more traffic." [2] The author starts by explaining the mechanism: when driving becomes faster, some people shift trips from other times, routes, or modes, and some people take trips they previously avoided. [3] The chapter then addresses a common misunderstanding: induced demand is not a moral judgment about drivers; it is a prediction about behavior under changed conditions. [4] Finally, the author connects the concept to evaluation, arguing that adding lanes can still be justified if the goal is freight movement, but it should not be sold as a permanent congestion fix. [5] The section ends by showing how the same evidence can support different decisions depending on which goal is stated upfront.

[1] Regulators confronting PFAS chemicals face a choice: regulate each compound individually or regulate the class. [2] The author begins with the argument for individual regulation: toxicity differs, and some PFAS have more evidence than others. [3] The chapter then describes the counterargument: industry can swap a restricted PFAS for a closely related one, keeping the function while escaping the rule. [4] Next, the author examines the practical constraint that testing each compound takes years, while contamination spreads through water systems now. [5] The conclusion proposes a hybrid: apply class-based limits for uses that lead to widespread release, while allowing limited exceptions where exposure is controlled and evidence supports safety.