You have three documents about the same course: a syllabus, a project brief, and a later correction. A summary that blends them without noticing the correction may sound coherent while giving the wrong deadline. How can a source notebook help you investigate rather than merely summarize?
Before you begin: Know how to check whether a source actually supports a claim.
Start with a question and a source set
A source notebook lets you collect material and ask questions grounded in that collection. Google's help page previously linked under NotebookLM presents the product as Gemini Notebook at this lesson's September 10, 2026 review. We keep the existing lesson URL and focus on the research method; consult the linked help page for the name and controls shown in your account.
Use public documents, your own notes, or short invented files for this exercise. Give each a clear title and date. If you use course materials, first check that uploading them is permitted. A source collection's usefulness depends on what you include and how clearly you can distinguish versions.
Ask a question you can verify
Create a fictional syllabus saying “The project is due on October 8,” and a dated correction saying “The project deadline is now October 10; all other requirements remain unchanged.” Ask: “What is the current deadline, and which document changes it?”
Open the cited passages. The right answer should use the correction and explain its relationship to the older syllabus. A citation to the syllabus alone would support the old date, not the current one. A citation is an invitation to inspect evidence, not a certificate that the synthesis is correct.
Ask for disagreement before synthesis
When documents conflict, ask the notebook to list the conflicting claims and their sources. Then decide whether one supersedes another based on authority, date, and explicit wording. A newer document is not automatically more authoritative, and a different date may refer to a different assignment.
Only after resolving that relationship should you ask for a consolidated study plan. Otherwise an early summary can erase the disagreement and make later answers look more certain than the evidence warrants.
Use generated study materials as practice
Source-notebook products can offer study guides, audio summaries, and other formats. These are derived materials. Check their important claims against the originals, especially dates, definitions, exceptions, and numerical values.
For active study, ask a question before reading the generated answer. Write your own explanation, then compare it with the cited source. Listening to a fluent overview can create familiarity without showing whether you can use the idea yourself.
If the notebook generates a quiz, inspect the question and answer key. A plausible multiple-choice question can still have two defensible answers or rely on material absent from your sources.
Understand what the notebook cannot supply
A notebook grounded in selected documents does not automatically establish that those documents are true, complete, or current. It may fail to retrieve a relevant passage, and imported material may not update exactly when the original changes. Check the product's source-import and refresh behavior for each source type.
If you ask about an unprovided grading rule, a useful answer says the sources do not specify it. Do not pressure the system to invent a rule to complete your plan. Add the appropriate source or ask the course owner.
Investigate a false conflict
Document A says “proposal due October 8.” Document B says “final project due October 10.” The notebook calls this a deadline contradiction. What should you check?
Compare the entities, not just the dates
The dates may refer to different deliverables. Read the surrounding passages and identify which assignment each deadline belongs to. A synthesis that treats every date as the same field creates a conflict that the sources do not contain. Your research question should preserve the distinction between proposal and final project.
Next, we will apply the same evidence-first habit to code assistants, where a plausible explanation must be checked against actual program behavior.
Reference
Google's source-notebook introduction describes supported sources, grounded chat, generated formats, and account-dependent conditions. Check the linked current help pages before relying on a particular feature or limit.