👉 Non-insertion, also known as non-inclusion or exclusion, is a concept in computer science and operations research that describes when a variable's value can be used more than once. It arises when an operation or algorithm has to select from multiple possible outcomes based on some criteria. The term "noninsertion" refers to the situation where the same value cannot be selected for both the selection of an item and its replacement with another item, which is not allowed by the operation or algorithm. For example
