There are two common theories that attempt to explain consideration.

A common theory holds that hot weather is more tolerable than cold.

The police investigation is still ongoing but the common theory is that a fire was the cause.

Today, the most common theory is that the dingo arrived in Australia about 4,000 years ago.

A common theory is that he died of a drug overdose.

Most governments start with either a common culture or a common political theory.

A common theory for the crime on the west side is the poverty that the residents there live in.

The two most common theories are population movement and internal conflict.

Two common theories were proposed to account for these effects.

A common theory along these lines is the self-medication hypotheses.