Working? Hardly

In 1942, Britain realized they were short of staff at the Government Code and Cypher School at Bletchley Park. (The school was working on breaking the Enigma's encryption, a vital war effort.) So, they placed a crossword puzzle in the Daily Telegraph, and challenged readers to complete it within 12 minutes. 25 readers responded as having done so, were invited in, and were issued a second puzzle with the same time restriction. 5 completed the puzzle in the time frame, and a sixth had only one word remaining. All six were interviewed and recruited to the school.

So, does this mean that -- as long as I have no other tasks to perform -- I can do puzzles at work guilt-free?