Questions were asked, theories arose, and instruments were invented to test new ideas.

Since the late twentieth century, alternative theories have arisen.

However, other theories and folk legends regarding the rivalry have arisen throughout the years.

Many other theories and arguments arose over who was responsible for the attacks.

Again, even within the confined group of religious, practicing Christians, more than one theory arose.

In the early 1970s, a theory arose on the connection between stepparents and child maltreatment.

Without an advocacy stage few general theories in biology would ever have arisen.

Two prominent theories have arisen to explain away this discrepancy.

Instead, he argues, theory and rules arise as tools to make practice more intelligent.

Out of the talk that follows Judge Pyncheon's death, however, a new theory arises.