Until we heard about an upcoming product from Japanese Lofty, we were pretty sure that we knew all about the art of napping (we usually just take one when we're tired), but the company's new high-tech pillow indicates that there's more guesswork involved in naptime than we'd previously thought.

ENGADGET: Japanese pillow offers napping advice

Until recently, determining the source of the pollution relied on little more than guesswork.

ECONOMIST: Pollution detection

Catalysts have long been a dark art, more inspired guesswork than analytical science.

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Under cross-examination, Ms Barlow admitted she had not made notes at the time prompting defence lawyer Brendan Kelly QC to claim it was more "guesswork" than scientific fact.

BBC: April Jones

Admittedly, forecasting and cost-benefit analysis on big, long-term projects such as this amount to little more than complicated guesswork.

ECONOMIST: High-speed rail

Yet even if Lord Layard's theory is right, his figure for the optimal tax rate looks like little more than convenient guesswork.

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Typically management is careful about disclosing details prior to the split, so analysts must employ more than the usual amount of guesswork.

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Accurate computer modelling of prescribed burns in various weather conditions would take much of the guesswork out of how to set them, and might give officials more confidence to fight fire with fire.

ECONOMIST: Computer models may soon help to predict forest fires