Doctor: I saved a woman's life.
Scientist: I've designed the missle defense system our country uses.
Dumbass: I only measure direct contributions, and I fail to understand that it is possible for something to indirectly benefit society. I'm the kind of person that thinks that rebounds and assists are useless in basketball.
Philosopher: I am interested in a discipline that has given birth to democracy and other political theories, the natural sciences, psychology, and more recently, cognitive science. Without the work conducted in philosophy, a monarch could destroy the house that a carpenter built without any compensation, and the knowledge necessary to save a person's life or to build a missile defense system would have not likely occurred.
I use logic to reach conclusions that are either necessary, contingent, or contradictory (impossible). Computers and robotics would be impossible without my contributions to propositional calculus, first-order logic, temporal logic, and modal logic.