Preconditions for understanding (formal specification)

The author argues that advocates of a formal method have an obligation to explain the relationship between the role of proof in that method and the role of proof in others. Such comparisons are needed to (a) clarify the 'method' behind a specific notation, (b) dispel misconceptions invited by the use of similar vocabulary with different meanings, and (c) suggest improvements to existing methods. These points are illustrated by comparing the use of preconditions in Z with that in other formal methods.<
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