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A '''grook''' is the name [[Piet Hein]] (1905-1996) used for his short, aphoristic poems. They came to wide attention when Martin Gardner mentioned them in his column in ''Scientific American.'' Two characteristic grooks:
PROBLEMS
Problems worthy of attack<br>
Prove their worth by hitting back.<br>
OMNISCIENCE
Knowing what<br>
thou knowest not<br>
is in a sense<br>
omniscience.<br>