[sebesta01] according to the author. consider the list of potential benefits of studying concepts of programming languages. one of the benefits would be argued as follows: many professional programmers have had little formal education in computer science; rather, they have developed their programming skills independently or through in- house training programs. such training programs often limit instruction to one or two languages that are directly relevant to the current projects of the organization. many other programmers received their formal training years ago. the languages they learned then are no longer used, and many features now available in programming languages were not widely known at the time. the result is that many programmers, when given a choice of languages for a new project, use the language with which they are most familiar, even if it is poorly suited for the project at hand. if these programmers were familiar with a wider range of languages and language constructs, they would be better able to choose the language with the features that best address the problem. this is an example of