Christie provides a few examples of how lawyers use the superimposition of several vague terms to arrive at a workable precision. From the 1938 Restatement of Torts:

An activity is ultrahazardous if it (a) necessarily involves a risk of serious harm to the person, land or chattels of others which cannot be eliminated by the exercise of the utmost care, and (b) is not a matter of common usage. (p. 896)

Differences can and do exist and even though they are difficult to articulate in words, it does not mean they should be ignored. The courts and juries are left to make distinctions among such words as "slight" negligence, negligence, "gross" negligence and recklessness. In other words, "distinctions are recognized in the law even though the distinctions cannot, in any very helpful sense, be adequately articulated" (p. 902).

Once distinctions are made in several prior cases, later cases that align...
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