Some theorists suggest that the experience of sexual desire may be socially constructed.

Few evolutionary theorists would suggest that it occurs inevitably.

But there could be even more dark matter farther out in space, perhaps enough to stop the expansion of the universe, eventually, some theorists suggested.

However, it is known now that some forms of emotional contagion are more subtle and automatic than early theorists suggested.

Some theorists suggest that this blurred boundary of work and life is a result of technological control.

One daring theorist among them even suggested studying violence.

On the other hand, some theorists have suggested that negative affect leads to greater creativity.

Several theorists suggest that "Jack the Ripper" was actually more than one killer.

A leading political theorist suggests that despite opposition to the plan, the government has no choice but to proceed with legislation.