The tendency for most people to try to solve the four-straight-lines version of the nine-circle problem by keeping their lines within the "mental square" illustrates _____.

Question

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The tendency to keep lines within a "mental square" in the nine-circle problem illustrates fixation, which is a cognitive bias that limits a person to using an approach or a specific set of solutions to a problem when broader or different solutions might be more appropriate. This fixation prevents seeing beyond the perceived boundaries of the problem.

The Tendency for Most People to Try to Solve the Four-Straight-Lines