These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Logic: At the end of the movie, the recently-widowed First Lady starts up a romantic relationship with Dave, a man who looks a lot like her deceased husband, and can't account for his whereabouts over the past few months. You think that might make people a teeny bit suspicious?
Eh, people will assume she's also an impersonator.
They might also assume it's something to do with her grief over the death of her 'beloved' husband; a bit unusual, perhaps, but not outside the realm of possibility.
Memetic Mutation: "I once caught a fish this big!" and "we're walking, we're walking".
Strawman Has a Point: Alexander objects to Dave beginning to act like an actual president, saying, "Was he on the Trilateral Commission? Was he a senator? Was he in Who's Who in Washington nine years in a row?" Granted, Alexander is totally corrupt and Dave certainly shouldn't be following his orders, but he does have a point that Dave is probably unqualified to be president himself.