Burger King's Whopper lawsuit just won't go away. A federal judge in Florida this week denied Burger King's request to dismiss a lawsuit against the company for false advertising related to its famous burger.

Multiple customers in a lawsuit claim that the fast-food chain’s Whopper sandwiches and other products are smaller than they advertised.

Related: Another fast-food burger chain is quietly closing locations However, this leaves many wondering what the borderline between reality and illusion is, and how far a company can go before it crosses the line into deception.