> Why is f computable Because f is either the constant 1 function or the constant 0 function, and both are computable. The fact that we don't know for sure whi

> Why is f computable Because f is either the constant 1 function or the constant 0 function, and both are computable. The fact that we don't know for sure which of those two functions the label "f" refers to doesn't matter if all we are asking is whether the function the label "f" refers to is computable. We know it is because both of the possible referents are computable.