Church–Turing thesis

The Church–Turing thesis is a fundamental concept in computer science and mathematics that proposes a formal definition of what it means for a function to be computable. Formulated independently by mathematicians Alonzo Church and Alan Turing in the 1930s, the thesis asserts that any function that can be effectively computed by a human using a set of clear, finite instructions (an algorithm) can also be computed by a Turing machine.