That is a crucial problem.

ECONOMIST: From the archive: Talking to Gaidar: From the hot seat | The

The firm makes recommendations about who is crucial and who may be a problem.

FORBES: The Skin Game, Updated

Dr Hinton's experiments have focused on hand-written letters and numbers (handwriting recognition being a crucial, and so-far unsolved, problem in machine vision).

ECONOMIST: Machine vision

In Indonesia, with crucial presidential polls scheduled for June, policy paralysis is a real problem.

CNN: THE LONG, HARD CLIMB BACK UP

And now there was another problem: the actor Ralph Riach, who played a small but crucial role in one of the story lines that Tykwer was working on, had fallen ill and been hospitalized, and his state was progressively worsening.

NEWYORKER: Beyond the Matrix

The bigger problem is that crucial documents for an entire industry are disseminated in a manner that resembles a game of telephone.

FORBES: MannKind Becomes Poster Child For Dangers Of FDA Secrecy

The wages that children earn are therefore likely to remain crucial to ensuring their families' survival unless and until a lasting solution to the liquidity problem emerges.

ECONOMIST: Kids need liquidity, too

Thus the crucial issue isn't merely the level of debt, though at some point that can become a problem.

WSJ: Review & Outlook: Debt and Growth