Kétértékû

Kétértékû is a Hungarian adjective that translates to "two-valued" or "bifid" in English. It is often used in contexts related to logic, mathematics, and sometimes in biology or linguistics. In logic, a proposition is kétértékû if it can only be assigned one of two truth values, typically true or false. This is a fundamental concept in classical logic, known as the law of the excluded middle. A statement is either true or it is false; there is no third option.

In mathematics, the term can appear in various fields. For instance, a function might be described as kétértékû if its codomain consists of only two elements. This could be relevant in areas like set theory or abstract algebra. In graph theory, a graph can be kétértékû if it has exactly two connected components.

The concept can also be encountered in less formal contexts. For example, a situation or a characteristic might be described as kétértékû if it presents two distinct, often opposing, aspects or possibilities. However, its primary and most precise usage remains within formal systems where the concept of duality or binary classification is central. The term emphasizes a strict dichotomy, where only two defined states are possible.