As an informatics student you learn hundreds of mathematical definitions and theorems and all of them seem to be useless programming. Here the evidence from the “real programmer life” to demonstrate you that’s not true. I was asked to analyze some very strange behaving class. The Contains(object obj) method was not working correctly on after populating the list with instances of this class. The problem was a mess implementation of bool Equals(Object obj) overloaded methods. There was no logical or...