Contributions are anything that you have done to make WikiAnswers better. Asking questions, answering questions, adding or changing categories, adding alternate versions of questions, and flagging...
The difference - is in the detail. Suppose someone asked the question 'What is the biggest snake'... Someone could post the simple answer... 'A Reticulated python' or 'An Anaconda'. However - someone...
Many philosophers have made contributions, such as Pythagoras, who made the Pythagorean theory, which is talking about angles such as a right angle and making that into an equation.