1.   Exposing premature babies to varying light, the researchers reasoned, may help them establish their own circadian rhythms.

2.   Since many different substances taste bitter, the researchers reasoned, there should be a family of bitterness receptors.

3.   The researchers reasoned that the mental anguish provoked by the remote possibility that a patient might be infected by the donor was not worth disclosure.

4.   The researchers reasoned that the mites would die out if the fungus could be destroyed.

5.   The researchers reasoned that the United States provides an especially clear window on the global situation because its long-term data are so abundant and clear.

6.   The researchers reason that by the time carbon dioxide pollution reaches Antarctica, such short-term variations have evened out.

7.   Thus, the researchers reasoned, the marrow must contain cells capable of regenerating other blood cells, something that mature blood cells are not able to do.