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在十九世纪五十年代和六十年代后期,施旺(Schw-ann)所建立的理论框架发生了根本性的修正。这种修正包括对施旺外源细胞形成论述的否定,并用直接细胞分裂的论述取而代之。这种修正的特征是,作为确定细胞的决定性要素,人们已将注意力从核和膜转移到原生质。按照拉卡托斯的科学观,这样的修正被认为是核心变化,由此修正的结果将不改变现存的研究纲领。在达尔文的进化论中,世代变化可解释为物种科系之间的过渡。很清楚,在十九世纪五十年代和六十年代,细胞的研究者们自发地修正施旺的细胞学说,同时富有成效地接受从施旺到更新的观点的变化系列,并集中精力修改之。再者,选择虽然不是解释修正的唯一工具,但却是主要的因素之一。因此,选定具有启发性理由的进化模式,将导致我们探求有关选择标准的变化,以图解释直接细胞分裂的理论如何取代施旺的外源细胞形成的理论。
In the late 1950s and the late 1960s, the fundamental framework set by Schw-ann had undergone a fundamental correction. This correction includes a negative argument about the formation of exogenous cells in Schwann, and is replaced by an account of direct cell division. A characteristic of this correction is that attention has been diverted from the nucleus and the membrane to the protoplasm as the decisive element in determining the cell. According to Lakatos' view of science, such a revision is considered as a central change, and the result of the revision will not change the existing research program. In Darwin's theory of evolution, changes in generations can be explained as the transition between species families. Clearly, in the 1850s and 1660s, cell researchers spontaneously revised Shih-wang's cellular theory while effectively accepting a series of changes from the perspective of Shih-wang to renewing and focused his efforts on modifying . Again, although the choice is not the only tool explaining the correction, it is one of the main factors. Therefore, the evolutionary paradigm chosen for the heuristic reasoning will lead us to explore changes in the selection criteria to illustrate the theory that direct cell division can replace the foreign cell formation of Schwann.