Write a Cited, Bounded Research Brief

Today's Goals

D1 defined Jo's decision, D2 created a source register, and D3 preserved a correction to the unit of a ridership count. Today you will turn those artifacts into a short research brief. Every material sentence must have a traceable evidence path. You will separate observation, reported experience, estimate, inference, and proposal, because a citation that supports one category does not automatically justify the next. You will write a conditional recommendation, audit missing caveats, and remove a claim that sounds useful but cannot be supported. The day's output is both the brief and the claim ledger behind it.

Harborfield, its transit office, all people and all numbers in this chapter remain entirely fictional. The offline lab is not a live Perplexity response. You may optionally use a current search interface to practice the workflow with public real-world material, but do not mingle that output with the Harborfield case or claim a live run occurred here.

Plain-Language Walkthrough

Give each sentence a job

A research brief is not a shorter version of every search result. It is an answer to Jo's choice under specified evidence and uncertainty. Think of it as a carefully labeled packing list. You cannot make the bag safer by stuffing more items into it; the items must be the ones the traveler needs, and fragile ones need labels. In a brief, the fragile items are numerical claims and conditional advice. A fluent paragraph can hide that one clause is measured, one is reported by volunteers, and one is Maya's inference. Assign each sentence a job before polishing its style.

Use five labels. Observed means an event was recorded under a documented method, such as HF-01's sampled weekday boardings. Reported means a person or organization said something, such as HF-02's volunteers describing their needs. Estimated means a calculation or preliminary judgment under assumptions, such as HF-03's operational feasibility. Inferred means Maya connects evidence to an interpretation and must state the reasoning. Proposed means a future action Jo may authorize. These labels are not ranks from weak to strong. They identify what kind of claim the reader is being asked to accept.

Start the brief with the decision question and as-of date: “Should Jo authorize design of a reversible weekday evening trial at Stops A and B as of August 20?” Then give the recommendation in conditional language. Follow it with a compact account of what is known, what remains unknown, and what should trigger the next decision. Avoid an introduction about the history of night buses unless that history changes this choice. A busy decision owner needs the question, evidence, assumptions, alternatives, and next action, not a tour through every page Maya opened.

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