MATH.23:6 - Bias-Annotation
Small examples are chosen to expose a relation and permit a full calculation. In a larger inquiry, simple generators can miss structures with different behavior. Change the generating rule or inspect a contrasting class when that difference could defeat the proposed claim.
A solved or famous problem can attract attention while its reusable mathematical contribution remains unclear. Recover the construction and the questions it opens. The choice of a next problem depends on the work and contributors, not on a universal ranking of interesting statements.