What a primary source is
Launch library · evergreen read
A primary source is firsthand evidence of an event or fact, such as an original document, direct testimony, raw data, or footage captured at the time something occurred, rather than a later description or interpretation of it, however routine it may otherwise seem, which helps explain why it endures.
Secondary sources, by contrast, analyse or report on primary material, and while they can be extremely valuable, checking back to the underlying primary source is often the clearest way to confirm whether a claim has been accurately represented, a factor that should not be underestimated, which is precisely why it is worth explaining clearly.
Building the habit of asking what the original source actually was, rather than relying solely on a summary or a screenshot, is one of the more reliable ways to guard against claims that have drifted from their original meaning, even though it rarely makes headlines, a distinction that carries real practical weight.