False.
Prolog is not a direct example of a fourth-generation programming language. This judgment is based on the following reasons:
First, Prolog is a logic-based programming language that is mainly used to express the logical relationship of problems and knowledge in the application field. Its design goal is to achieve problem solving, artificial intelligence, and natural language processing. The core theory of Prolog is first-order logic, which uses predicate logic to describe the logical relationship of problems and solves problems through pattern matching and backtracking. These characteristics make Prolog widely used in artificial intelligence, expert systems, natural language processing and other fields, but it does not directly belong to the category of fourth-generation programming languages.
Secondly, fourth-generation programming languages (Fourth-Generation Programming Language, referred to as 4GL) are mainly designed to solve problems in specific fields. They have a higher level of abstraction, allowing non-professional programmers to complete complex tasks through simple instructions or statements. Such languages are usually used in database management, report generation, application development and other fields. Although Prolog has similarities with fourth-generation programming languages in some aspects (such as database queries), it is more regarded as a logical programming language rather than a pure fourth-generation programming language.
Finally, it should be pointed out that the classification of programming languages is not absolute, and different classification criteria may produce different results. However, in the usual classification, Prolog is not classified as a fourth-generation programming language.
In summary, Prolog is not a direct example of a fourth-generation programming language.