Is A “Black Box” A Candidate For Axiom As A Concept In Algorithms?

A black box and a function might have very little difference between them. What might make the term “black box” definitive?

As formative thinking, a black box is characterized by accomplishing its operation without affecting ANYTHING outside its internal mechanisms; perhaps this includes the idea that it cannot be observed.

A “function,” is defined as “a reusable block of code that a specific task. It accepts input, processes it and “returns” a result.”

My first thought on this, is that functions can return intermediate values, and black boxes might be barred from iteration or recursion by definition.

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