The phrase "scientific method" is often taught in schools as a fixed sequence of steps: observe, form a hypothesis, design an experiment, collect data, draw conclusions. While this simplified picture captures something real, it understates the flexibility and occasional untidiness of the way science is actually done. Historians and philosophers of science have increasingly come to see the scientific method less as a recipe to be followed than as a set of interlocking habits of mind.
At the core of these habits is a particular attitude towards evidence. A scientific claim, properly understood, is one that can in principle be shown to be false by observation or experiment. The Austrian philosopher Karl Popper argued that this capacity for falsification is what distinguishes genuine science from pseudo-science. A theory that cannot be refuted by any conceivable evidence, however impressive its explanations, lies outside the scientific domain.
Equally important is the social character of the enterprise. Individual researchers may propose, but it is the wider community that tests, criticises and eventually accepts or rejects. Peer review of published papers, the replication of experiments by independent teams and the ongoing debate at conferences are all mechanisms by which knowledge is corrected. When this social system works well, errors by any single researcher are caught; when it fails, misleading results can persist for years.
Understanding the scientific method in this richer sense has practical consequences. It clarifies, for instance, why a single striking experiment is rarely enough to establish a claim, and why the word "proof" - common in mathematics - is used more cautiously in the empirical sciences. It also explains why scientists resist demands for absolute certainty: science delivers reliable knowledge, but it does so by remaining open, at least in principle, to revision in light of new evidence. Far from being a weakness, this openness is the source of its long-term success.