The precise motives for the French intervention have never been clear.

'It is impossible to determine the precise motive,' a spokesman for the Brussels prosecutor's office commented.

I don't suppose we'll ever know his precise motives.

More than two years after the blast, the authorities can still only speculate about a precise motive and who financed the plot.

Ravna might mask her precise motives, but her desperation was clear.

Lieutenant Mercado said investigators had not yet identified suspects or a precise motive in the shootout.

Even to those who accept that conclusion, Oswald's precise motives remain unclear.

Still, the precise motives of the hijackers are murky.

We don't have a precise motive at this point.

Sadness almost always stems from a precise motive and is therefore concentrated, whereas there are no exterior causes for melancholy.