Algebraists do it on field trips. Analysts Analysts do it continuously. Analysts do it smoothly. Analytic number theorists do it in the critical strip. Analytic number theorists do it on the critical line.
Applied mathematicians do it by computer simulation.
Applied mathematicians do it with a real world model. AI researchers do it heuristically when principled techniques fail. Astrophysicists Astrophysicists do it in the dark. Astrophysicists do it with telescopes. Astrophysicists do it with large objects.