Other observers have doubted the role that the yield curve plays in controlling the business cycle.

So most observers doubt that a single instance of infidelity would cause a public uproar like the present one.

Many observers doubted the ability of Turkish politicians to carry out the needed reforms.

A good many observers even doubted whether wars between States at approximately the same level of civilization could have any decisive result.

Some observers, especially people in the Muslim world, doubted the authenticity of the tape.

Few observers doubt that some changes are called for in the federal Civil Service system.

Competition in the personal workstation market is fierce, and some observers doubt that the new approach will do anything but muddy the waters even more.

But this difference is smaller than the drop in crime, and some observers doubt that it would have much impact on the crime rate anyway.

Some observers doubt that the Missouri Representative is really a populist.

Most observers doubted that China would risk another war with Vietnam in the near future.