Such figures are only rough estimates involving guesswork on factors like the amount of cocaine being produced and processed.

Bidding the South hand automatically involves guesswork.

It does not involve guesswork about who might be dangerous.

They will involve guesswork about highly personal decisions, and about how 50 state governments will react, especially about changes in Medicaid.

"Reconstruction always involves guesswork, but it's a fair effort," said Andrew George, a British expert.

Absent stricter Federal rules, buying a toy often involves dangerous guesswork.

Economic forecasting and the impact of economic factors on the markets must involve guesswork, something he would prefer to avoid.

However, from this point on, there is no full theory; the description is almost entirely observational and so the interpretation involves more guesswork.

A greater fear is that much of what the corps wants to do involves guesswork.

Treatment involves guesswork because doctors have not pinpointed what causes migraines, nor do they know which drugs will best help which patients.