Every researcher does it. You are writing a paragraph that requires a citation. You know the source that belongs there. It is the foundational paper everyone in the field cites for this point.
You have not read it.
You have read papers that cite it. You have read summaries of it. You know the claim it is supposed to make. You insert the citation. The paragraph now reads as well grounded.
This is acceptable until it is not.
Most of the time, citing a paper you have not read is harmless. The foundational claim may be genuinely foundational, the citation may be correct, and your paragraph may rest on the same understanding the field has accepted. In that case, you are functioning as part of a citation network that has already done much of the verification work.
The harm comes in three specific situations, each of which careful readers notice.
The first is when the foundational paper does not actually say what the field has decided it says. This happens more often than researchers like to admit. A paper published decades ago may have made a careful, hedged argument about a specific population, method, or context. Over time, citation drift turns that argument into a general claim. You cite the paper for the general claim. A reader who has actually read the original source notices. At that point, they begin to doubt your scholarship.
The second situation is when the foundational paper has been revised, qualified, or challenged by later work, but your citation implies an endorsement that the current literature no longer supports. You cite an older source for a methodological point. Later scholarship has shown that the method works only under narrower conditions, or that the original author changed their position. A careful reader sees the outdated citation and concludes that you are not fully current with the literature you are using.
The third situation is the most embarrassing. The foundational paper is not the right citation for the point you are making. The correct citation is in another paper, but the familiar source is the one everyone uses, so you use it too. A reviewer who knows the literature well may write that the authors probably mean another source here. They are not being difficult. They have identified a citation that is standing in for reading.
The discipline is not to read every paper you cite. That is impossible once a project grows beyond a small literature. The discipline is to know which citations you are responsible for and which citations you are inheriting.
A practical rule helps. If a citation is doing serious work in your argument, read the source. If it supports your central claim, provides the methodological foundation for your analysis, or names the intellectual tradition in which you are placing the paper, read it carefully. Take notes. Know what it says, what it does not say, and how far its claim can travel.
If a citation is doing background work, the obligation is different. A source that establishes that a topic exists, identifies a broad debate, or provides one example among several may not need the same level of direct engagement. In those cases, you may rely on the field’s collective verification, provided the citation is conventional, current, and not central to your argument.
The judgment is yours, and you will sometimes get it wrong. But the cost of getting a serious citation wrong is meaningful. It can weaken a reviewer’s confidence in the manuscript. It can make the literature review look derivative. It can suggest that the author knows the field through citation habits rather than through reading.
The cost of reading one more important paper is usually smaller.
When uncertain, read.
There is a related discipline that researchers often learn early and abandon later. When you cite a paper you have read, cite the page, section, table, or argument that contains the specific claim you are using. This is honest scholarship. It tells the reader where to verify your use of the source.
Specific citations also discipline the writer. They are harder to fake. They require the author to know the location of the claim, not only the reputation of the source. Returning to this practice sharpens the literature review, improves the accuracy of the argument, and makes the manuscript more trustworthy.
A citation is not only a name in parentheses. It is a claim about what you have understood.