Cognitive conflict is a prerequisite for schema restructuring — congruent information cannot trigger it

Schema restructuring — a change in the solver's mental representation of a problem — is not triggered by information that confirms existing structure. Danek and Flanagin's insight-neuroscience work (magic-trick paradigm, fMRI) states the dependency directly: "Conflict detection is a prerequisite of restructuring." The asymmetry between confirming and conflicting input is sharp: "Only the incongruent cues produce a cognitive conflict by forcing participants to question their initial problem representation," and "cognitive conflict is needed in order to trigger a change in the problem representation."

Empirically, conflicting cues outperform confirming ones: incongruent cues were reported to be more helpful and had higher solution rates than congruent cues. (Wording note: the promoting capture recorded this last finding as an exact quote in slightly different words; the full-text check found the finding stated as paraphrased here. The three quotes above are verbatim-confirmed.)

The structural claim generalizes beyond insight puzzles: a knowledge system that only ever receives — or only ever files — schema-consistent information will not restructure, because the trigger for restructuring is the friction of something that does not fit. Whatever suppresses or smooths over that friction (forcing items into ill-fitting categories, "miscellaneous" buckets) removes the restructuring signal itself.

See also introspection-access-problem — the schema cannot observe itself; it can only notice what refuses to fit.