Truth, is it what the majority believes or what is factual? Dave Barry wrote a letter to his grandson explaining the do’s and don’ts of life, including ketchup and mustard. All of Barry’s advice, has a common theme behind it, always be oneself. In the letter, Dave Barry teaches his grandson life lessons -beginning with the ketchup, by Dave Barry, he uses situational irony and hyperboles to have a high comedic effect to express the universal truth of being the person one wants to be, not the person others want them to be. Dave Barry uses situational irony to express the common theme. At the beginning of the letter, Barry express his main belief in life, “Here’s the main thing I have learned: You do not need to refrigerate ketchup or mustard”