Normal science operates within an unquestioned paradigm

Kuhn describes most scientific activity as 'normal science' — detailed, often narrow work conducted within a shared framework of theory, method, and accepted problems that a scientific community takes largely for granted rather than constantly re-examining. Researchers within a paradigm aren't trying to overturn the framework; they're filling in its details, refining its predictions, and solving the puzzles it defines as worth solving.

This isn't intellectual laziness, in Kuhn's account — it's what makes precise, cumulative research possible at all, since scientists don't have to relitigate foundational assumptions every time they run an experiment. A shared paradigm functions like a set of rules everyone agrees to play by, freeing attention for detailed puzzle-solving rather than perpetual re-justification of the basics.

The catch is that this same stability makes a paradigm resistant to challenge, since anomalies that don't fit are often treated as puzzles yet to be solved within the framework rather than evidence against the framework itself. Takeaway: most of what looks like steady scientific progress is puzzle-solving inside assumptions nobody in the room is questioning.