When Paul instructed Timothy in 1 Timothy 4:7 to 'refuse profane and old wives' fables,' he gave English its standard phrase for unfounded popular beliefs passed down through tradition rather than reason or evidence. The KJV translation - 'old wives' fables' - was subsequently rephrased in popular usage to 'old wives' tales,' and the phrase became a fixture of scientific, medical, and educational discourse.
The Greek Paul used was graodeis mythos: literally 'old-womanish myths' or 'myths fit for old women.' The phrasing reflects a cultural assumption, widespread in the ancient world and deeply unjust by modern standards, that elderly women were the primary transmitters of superstitious belief and folklore - a repository of traditional knowledge that was simultaneously valued for its practical wisdom and dismissed for its alleged irrationality. Paul's specific target in 1 Timothy appears to be the gnostic-influenced myths and genealogies being spread in the church at Ephesus: speculative cosmological stories with no apostolic authority. His point is that Timothy should not dignify these narratives by engaging them on their own terms.
In English the phrase detached from this specific target and became a general category for any belief transmitted by tradition that lacks empirical or rational support. Medical folklore is the domain where the phrase appears most often. 'Does reading in dim light ruin your eyes? That's an old wives' tale.' 'Does chicken soup cure colds? The old wives' tale turns out to have some truth.' The phrase is used both to dismiss beliefs (most commonly) and occasionally to rehabilitate them - the secondary use reflecting the recognition that folk medicine sometimes encodes genuine observation, even if the explanatory framework is wrong.
The phrase is explicitly gendered, and this has attracted critical attention. The association of unfounded belief with female oral tradition reflects and perpetuates a devaluation of traditional knowledge as a category - knowledge transmitted by non-expert, non-institutional means by those excluded from formal learning. Feminist historians of medicine have pointed out that much of what was dismissed as 'old wives' tales' in the early modern period was in fact accumulated empirical observation by herbalists, midwives, and healers who had extensive practical experience. The dismissal was social as much as epistemic.
Nonetheless, the phrase has achieved stable negative meaning in educated usage: an old wives' tale is something believed on traditional authority that turns out to be false or unverifiable. It functions as a quick epistemological classification, placing a belief in the category of folklore rather than evidence. Science journalism uses it regularly to announce the debunking of popular misconceptions.
The irony noted by some scholars is that Paul's original context was religious rather than scientific: he was defending apostolic tradition against mythological speculation, not defending empirical knowledge against superstition. The phrase was borrowed by Enlightenment discourse and repurposed to serve a very different epistemological project - the distinction between rational knowledge and traditional belief - than the one Paul intended. His 'profane and old wives' fables' were myths that competed with the gospel; English culture's 'old wives' tales' are folk beliefs that compete with science. The phrase traveled between these very different epistemic wars and retained its function in both.