Thagard (1992) presented a framework for conceptual change in science based on conceptual systems. Thagard challenged belief revision theorists, claiming that traditional belief-revision systems are able to model only the two most conservative types of changes in his framework, but not the more radical ones. The main aim of this work is to take up Thagard’s challenge, presenting a belief-revision-like system able to mirror radical types of conceptual change. We will do that with a conceptual revision system, i.e. a belief-revision-like system that takes conceptual structures as units of revisions. We will show how our conceptual revision and contraction operations satisfy analogous of the AGM postulates at the conceptual level and are able to mimic Thagard’s radical types of conceptual change.

Thagard (1992) 提出了一个基于概念系统的科学概念变化框架。Thagard 向信仰修正理论家发起挑战，声称传统的信仰修正系统只能模拟他的框架中最保守的两种变化类型，但不能模拟更激进的变化。这项工作的主要目的是迎接萨加德的挑战，提出一个类似于信念修正的系统，能够反映激进类型的概念变化。我们将使用概念修订系统来做到这一点，即以概念结构作为修订单元的信念修订系统。我们将展示我们的概念修正和收缩操作如何在概念层面满足类似于 AGM 假设的要求，并且能够模仿 Thagard 的激进类型的概念变化。