Overloaded fields, type safety, and you

Image by Kate Hudson with help from Photoshop AI I recently learned that Southwest has a policy of giving passengers who don't fit in a single seat a free second seat. This isn't an issue for me personally, but I was curious how it worked and that lead me to Southwest's page on how to book a second seat: Southwest's passenger entry field Here are the instructions: Complete the "Who's Flying?" name fields for a Customer of size as follows: Without a middle name: A Passenger named Tom Smith would designate Pa