When you specify you have "studied in mechanical engineering", is it safe to assume that you have never held a position as a mechanical engineer in a non-educat

When you specify you have "studied in mechanical engineering", is it safe to assume that you have never held a position as a mechanical engineer in a non-educational capacity? If that is the case, how is your anecdotal observation that you have "never EVER seen anyone use calculus to solve their problem in the real world" even remotely close to relevant? Furthermore, I have noticed that people have a tendency to conflate "using calculus" with their experience completing homework assignments in their high school/college calc 1 courses. No, that's not what "using calculus" is, unless of course you're still a student or cannot conceive of a world beyond your own narrow life experiences. Many of us use mathematics to solve real problems in the real world on a daily basis - and it would be beyond arrogance to suggest that calculus is irrelevant. If you get a chance, pick up the book "Concrete Mathematics" - and "Concrete" is a play on "Continuous and Discrete" math. It's by Donald Knuth and it's a wonderful read. If you're a working programmer or employed in a technical field, you will be better off after understanding how to solve the problems in that book. Calculus and all derivative mathematics touches more facets of our daily lives than perhaps any other "theoretical" field in academia.