Disjunction Elimination is a rule in formal logic that allows one to conclude a statement based on a disjunction, which is a logical statement that uses "or." If you have a disjunction, such as "A or B," and you know that one of the options leads to a certain conclusion, you can eliminate the other option to reach that conclusion. This process helps simplify logical arguments. For example, if you know "It is raining or it is sunny," and you also know "If it is raining, then I will stay inside," you can conclude that you will stay inside regardless of whether it is raining or sunny. This method is useful in proofs and reasoning.