Can medical tests ever be absolutely certain?

In a recent high court case in Ireland, a Judge in the High Court ruled in a precedent-setting decision that in delivering an ‘all-clear’ result from a cervical smear test, the lab should only do so in cases where they have absolute certainty. The language used has raised significant concerns, as such a threshold is seen as too high to reach. As cancer specialist Prof Donal Brennan told RTE, there’s very little that is absolute in medicine; one presumes he was thinking of death as the sole exception to the rule. The reaction briefly opened up a dialogue on science and knowledge, truth and epistemology, revealing a fundamental flaw in the human condition, and just as quickly it closed again.