pattern we expected to see.
This habit is useful in everyday life. The brain constantly sorts information, notices familiar shapes, and fills in details so we can understand the world efficiently. We do not need to study every letter in a familiar word or every step in a routine task. Pattern recognition helps us read, navigate, and make quick decisions. But the same shortcut can sometimes cause us to overlook a detail that does not fit.
That is why a simple number puzzle can be more challenging than it first
