41.   Sylvain Pare, a former mathematics teacher who has opened The Leaf-Turner and specializes in science and nature, has a different theory.

42.   The FBI and the safety board have different missions that lead them to favor different theories.

43.   The Florida Legislature has a different theory.

44.   The fourth force, gravity, is described by an entirely different theory, general relativity.

45.   The justices ordered the case back to a federal trial court for further proceedings to see whether those women might have a valid claim under different legal theories.

46.   The prosecution puts forth a different theory.

47.   The three Democratic candidates for governor each have different theories about how they can take advantage of the dissolving political culture.

48.   The suits in Philadelphia and Chicago are likely to be based on different legal theories than the product liability claim in New Orleans.

49.   There are different theories, and all make sense.

50.   Tom Siebel, chief executive of softwaremaker Siebel Systems, offered a different theory in a recent interview with The Chronicle.