21.   But polling is not an exact science, especially in such a turbulent atmosphere as that in Russia.

22.   Charting the fortunes of the dead is not an exact science.

23.   Choosing rice for risotto is something of an exact science.

24.   Clearly, this is not an exact science.

25.   Committee members know that their trade is hardly an exact science.

26.   Cooking, he says, is an exact science.

27.   Criminology is not an exact science, but police officials and outside experts said that a number of factors contributed to the higher clearance rate.

28.   Economics is hardly an exact science in which right and wrong answers can be tested and determined in advance, and the consequences of policy changes known with accuracy.

29.   Even Connecticut Secretary of the State Pauline R. Kezer, a Republican who oversaw the post-election review, admitted that vote counting is not an exact science.

30.   Even though this is not an exact science, we are trying to gather data and make general observations.