👉 Decidability is a concept in computational complexity theory that refers to the ability of a problem to be decided or solved by an algorithm. In other words, it describes how well a decision problem can be expressed as a program that computes a Boolean value (true or false) from input data. The concept of decidability has been important in the development of algorithms for solving combinatorial problems and is fundamental to many areas of computer science, including mathematics, physics, and artificial intelligence. Decidability