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Guilford was one of the first academic researchers who dared to conduct a study of creativity.
There seemed to be no end to the insights that could be offered under the banner of thinking outside the box.
The idea went viral (via 1970s-era media and word of mouth, of course).
Overnight, it seemed that creativity gurus everywhere were teaching managers how to think outside the box.
If you have tried solving this puzzle, you can confirm that your first attempts usually involve sketching lines inside the imaginary square.
The correct solution, however, requires you to draw lines that extend beyond the area defined by the dots.