求问defend,和consideration在逻辑题里的意思

一直没搞清楚逻辑里面的黑体字的题中有时会出现 defend,和consideration这两个单词，请问它们分别指什么意思？

defend是“支持”还是“反对”的意思？如gwd6-16：

B：The first provides evidence in support of the overall position that the historian defends; the second is that position

gwd1-3：

B：The first is a consideration raised to explain the appeal of a certain strategy; the second is a consideration raised to call into question the wisdom of adopting that strategy.

楼主看看flhl的BF总结嘛

defend防守<-->offend进攻 （楼主肯定没看过NBA）

consideration 我的理解就是推理链LOR

但LZ要注意修饰对象