21.   Their encounters seem beyond rational explanation.

22.   There is no other rational explanation for why Torre, who told friends that he hoped to sign a contract last March, is still waiting.

23.   There was a rational explanation, of course.

24.   There is, no doubt, a perfectly rational explanation for this noise.

25.   There seemed to be no rational explanation for it.

26.   Then, at the end, it makes the fatal mistake of providing an entirely rational explanation for what happened.

27.   What Cone is doing defies rational explanation.

28.   Why the Republicans expect Bush to escape the sort of media acid that bathed Clinton is beyond rational explanation.

29.   But Jose Koli, an engineer working on the Contuboel rice project, said there was a more rational explanation.