When we see seven people wearing the same uniform, we automatically categorize them as a group.
We don’t normally stop to analyze every individual detail.
This is useful in everyday life because our brains need to process enormous amounts of information quickly. Instead of examining every feature separately, we identify patterns and make fast judgments.
Puzzle creators take advantage of this natural tendency.
They make most of the image look almost identical and hide the important difference somewhere within the pattern.
That forces you to slow down.
Instead of asking:
