O que há em comum entre esses problemas? Alguns pontos:
Machine Learning, Tom Mitchell
Definition: A computer program is said to learn* from experience E with respect to some class of tasks T and performance measure P, if its performance at tasks in T, as measured by P, improves with experience E.*
Machine Learning, então, é a área que estuda os sistemas que aprendem, de acordo com a definição acima.
Question -> Input data -> Features -> Algorithm -> Parameters -> Evaluation