Explain whether a source counts as primary or secondary with the reasoning behind the verdict, or check every source in a bibliography at once.
You are a research librarian and academic writing tutor who has spent years teaching students and researchers to tell primary sources from secondary sources correctly, including the specific cases that trip up nearly everyone. I need you to work in [MODE:select:Classify one source,Classify a list of sources] mode for a [DISCIPLINE:select:History,Literature,Political Science,Psychology,Sociology,Biology or Health Sciences,Education,Business,General Academic] project at the [GRADE_LEVEL:select:Middle School,High School,Undergraduate,Graduate] level. Ground every verdict in the core distinction. A primary source is firsthand or original, something created by a person who directly experienced, witnessed, or produced the event, data, or work being studied. That covers interviews, original research data, historical documents like letters and government records, speeches, and a literary text such as a novel, poem, or play. A secondary source interprets, analyzes, or comments on primary sources instead of presenting firsthand evidence. That covers textbooks, review articles, biographies, literary criticism, and documentaries. If I chose the single-source mode, here is the source I need classified: [SOURCE_DESCRIPTION?]. State the verdict first, primary or secondary, then explain the reasoning using the specific details I gave you: who created it, how close it sits to the original event or data, and whether it presents firsthand evidence or someone else's interpretation of it. After the verdict, tell me exactly what would need to change about this same source for it to flip to the other category, so I understand the boundary instead of just memorizing a label. If I chose the list mode instead, here are my sources: [TEXT?] Number them in the order I gave them, and for each one give a one-line verdict followed by a one-sentence reason. Flag any source you had to guess about, and say what assumption you made. If neither [SOURCE_DESCRIPTION?] nor [TEXT?] has anything in it, stop and ask me to paste one before you classify anything. Watch for the classifications that regularly get called wrong. A newspaper article is primary when the reporter witnessed the event and is filing a firsthand account, and secondary when the article is analyzing or summarizing events that already happened. An autobiography or memoir is primary because it is the subject's own firsthand account, while a biography written by someone else about that same person is secondary. A review article or meta-analysis is secondary, even though the individual studies it draws on are primary. Also check whether the verdict depends on which field is asking the question. The same source can be secondary in the discipline it is about and primary in a discipline that studies the source itself. A history textbook's chapter on World War II is a secondary source for a history paper about the war, but that exact chapter becomes a primary source if the paper is about how World War II gets taught in schools, because the textbook is now the object being studied rather than a source about the event. Flag this discipline-dependent case whenever it applies, and name both readings. Close by rating your confidence in each verdict. If [SOURCE_DESCRIPTION?] or an entry in [TEXT?] does not give you enough detail to classify it with confidence, say so directly and name the specific missing detail, such as whether the creator witnessed the event firsthand, instead of guessing.
Use this prompt anywhere
10,000+ expert prompts for ChatGPT, Claude, Gemini, and wherever you use AI.
Get Early AccessEvery citation in a paper carries a label most instructors never fully explain: is this source primary or secondary? Get it wrong and a professor marks the whole entry incorrect, even when the source itself was a fine choice. This tool settles the question for you, either one citation at a time or across a full list.
Paste a single [SOURCE_DESCRIPTION] and it tells you whether you have a primary or a secondary source, walks through the specific reasoning behind that call, and shows exactly what would need to change for the verdict to flip. Or paste your whole [TEXT] of sources and it classifies each entry in order, so you are not guessing your way down a fifteen-item bibliography one search at a time.
It also catches the calls that trip up most students: a newspaper article that counts as primary when a reporter witnessed the event and secondary when the piece analyzes something that already happened, plus sources that change category depending on which field is asking the question. Once you know what type each source is, the companion primary source analysis tool walks through a single primary source in full using the OPVL framework historians actually use.
Open it in the Dock Editor to classify sources while you build your bibliography, or run it directly in ChatGPT, Claude, or Gemini.
Start in the Dock Editor for an editable, saved copy, or paste this straight into ChatGPT, Claude, or Gemini. Set [MODE] to Classify one source when you have one citation to check, or Classify a list of sources when you are working through a full bibliography at once.
Choose your [DISCIPLINE] and [GRADE_LEVEL] so the reasoning, examples, and depth match your field and how advanced your writing should read.
For single-source mode, paste the citation or description into [SOURCE_DESCRIPTION]. For list mode, paste your whole reference list into [TEXT] and each entry gets its own verdict.
Check the primary or secondary verdict, then read what would need to change about that exact source for the classification to flip. That is the part that teaches the distinction instead of just labeling it.
If a source did not give enough detail, the output names exactly what is missing instead of guessing. Fill that gap in and rerun it if the verdict matters for a grade.
Learn the difference for a first big research project by pasting one confusing citation into [SOURCE_DESCRIPTION] and seeing the exact reasoning instead of a bare label. Set [GRADE_LEVEL] to High School for explanations pitched at that level.
Classify an entire works-cited list in [TEXT] before submitting a paper, catching any source misfiled as the wrong type. Feed the sorted list straight into an annotated bibliography once every entry is confirmed.
Work through the discipline-dependent cases that a literature review needs to get right, like a textbook that is secondary for a history topic but primary for a paper on how that history gets taught.
Check a student's whole reference list in one pass by setting [MODE] to Classify a list of sources, then use the flagged assumptions to show exactly where their reasoning broke down.
Discover more prompts that could help with your workflow.
Analyze historical documents, letters, artifacts, and original texts using established historical methodology including OPVL framework, contextual analysis, and bias evaluation
Write compelling research grant proposals with proper structure for NIH, NSF, and foundation funding including specific aims, significance, innovation, approach, and budget justification
Create a properly formatted academic curriculum vitae for researchers, professors, and PhD students with comprehensive sections for publications, grants, teaching, and service
10,000+ expert-curated prompts for ChatGPT, Claude, Gemini, and wherever you use AI. Our extension helps any prompt deliver better results.