1.   The second theory of the nature of the company is the contractual one.

2.   A second theory is that Khatami is permitting the crackdown as a gesture to the traditionalists as he tries to improve relations with the West.

3.   A second theory relates to the frequency of other sexually transmitted diseases, particularly those that break the skin, thus easing entry of HIV.

4.   A second theory holds that the brain has trouble processing signals from the ears, leading to a disruption in speech.

5.   A second theory is more intriguing.

6.   A second theory is that people simply do not know how to use the brakes.

7.   A second theory is that the constituency of the Commerce Department is limited.

8.   For most of the week, bizarre though it was, the second theory seemed plausible.

9.   Hekimi thinks the clock genes tie into the second theory.

10.   His second theory is even more speculative.