A counterexample is a specific example that contradicts a claim, hypothesis, or generalization. In logic a counterexample disproves a universally stated claim, and does so rigorously in the fields of mathematics and philosophy. For example, the statement that "student John Smith is not lazy" is a counterexample to the generalization "students are lazy", and both a counterexample to, and disproof of, the universal quantification "all students are lazy."
In the Vinony graph
Within Vinony's link graph, 反例 is referenced by 190 other articles, and connects out to mathematics, philosophy and Plato.
Vinony files it under Interpretation (philosophy), Logic and Mathematical terminology.
Its subject is documented across 29 Wikipedia language editions.
Wikidata facts
Sources (2)
via Wikidata · CC0
Article · 中文
在逻辑学中，反例是相对于某个的概念。反例在数学、哲学和自然科学中都有重要的应用。举例来说，对一个命题：所有的天鹅都是白色的。这是一个全称命题，声明对于某类事物全体（所有的天鹅），都有某个性质（是白色的）。为了说明这个命题不是真的，只需要举出一个例子，其对象属于这类事物，但不具有命题中声称的性质就可以了。这样的例子称为反例：一只不是白色的天鹅就是这个命题的反例。
Abstract from DBpedia / Wikipedia · CC BY-SA