6 ideas
A paradigm is a constellation of shared assumptions, exemplary problem-solutions, methods, and standards that a scientific community accepts and uses to define legitimate problems and answers. It functions less as an explicit theory than as a model that practitioners learn by example and apply without re-justifying its foundations.
Most scientific work is not about questioning fundamentals but about solving puzzles whose existence and rough solution are guaranteed by the reigning paradigm. The scientist's skill is measured by their ability to articulate and extend the paradigm, not to overturn it, and failure to solve a puzzle reflects on the scientist rather than the framework.
Individual observations that violate paradigm expectations are initially absorbed, ignored, or treated as errors rather than refutations. Only when anomalies persist, multiply, and resist resolution do they produce a crisis that makes the community willing to consider abandoning the framework.
Rival paradigms cannot be fully judged against each other because each defines its own problems, standards of evidence, and even the meaning of shared terms. Proponents of different paradigms talk past one another, so the choice between them cannot be settled by neutral logic or data alone.
Adopting a new paradigm is less like adding facts and more like a perceptual conversion in which the same data suddenly mean something different — scientists 'see' a new world after the change. Because it resembles a religious conversion or gestalt flip, persuasion and generational replacement, not pure proof, drive its acceptance.
Science does not advance by steadily piling verified truths onto a growing edifice; it alternates between long stretches of cumulative normal science and disruptive revolutions that discard parts of the prior framework. What counts as 'progress' is defined retrospectively by the winning paradigm, so the history is rewritten to look linear.