The science or art of correct reasoning; also, a work on this science.

逻辑；理则学；理则学书籍。

Valid or sound reasoning.

正确之推理。

System of classification of thought in any branch of knowledge.

(各类知识的)思想系统。

Particular way of reasoning.

推理的方法。

The logical operations performed by a computer by means of electronic circuity, such as comparing, selecting, and sorting.

【电脑】逻辑运算(由电脑所作的运算，例如比较、选择、分类)。