It wasn't necessarily. You could redefine the "true meaning" of the training data such that it wasn't an addition operation but was actually some other one, wit

It wasn't necessarily. You could redefine the "true meaning" of the training data such that it wasn't an addition operation but was actually some other one, with the same data, and then the generalization would be wrong. https://en.wikipedia.org/wiki/Gettier_problem https://en.wikipedia.org/wiki/Gettier_problem