1.   There was, once upon a time, another book from which this kind of scientific certainty was derived.

2.   It enshrined the so-called precautionary principle, agreeing that lack of scientific certainty should not be used as a reason for postponing cost-effective measures to halt environmental degradation.

3.   It enshrined the so-called precautionary principle, arguing that lack of scientific certainty should not be used as a reason for postponing cost-effective measures to halt environmental degradation.

4.   And while we cannot claim scientific certainty for this, we are under the firm impression that the heat causes more consternation than the cold.

5.   Because DNA evidence can be powerful, due to its air of scientific certainty, its use has often been hotly disputed.

6.   Because DNA evidence can be overwhelmingly convincing, swamping all other evidence with its air of cold scientific certainty, its use has been particularly controversial.

7.   Or can it act even in the absence of scientific certainty?

8.   Some scholars say the inconsistencies are a small price to pay for a legal system that does not have the luxury of waiting for scientific certainty.

9.   Still, presidential politics is an uncertain art, a realm far from scientific certainty.

10.   The court held that an expert could not testify about the scientific certainty of a technique unless its accuracy had been tested and its rate of error was known.