Sports have always been a way for people to bond over loving the same team or argue over rivals. So naturally, wearing a shirt representing your team is any way to show (loud and proud) that you support one team over the other. You’re basically a walking visual argument.
My brother goes to U Miami, he’s a sophomore there and ever since he started about a year ago, I’ve been given nothing but UM t-shirts, hats, sweatshirts, sweatpants, keychains, etc. to show that someone I know goes to U Miami… Forget about the fact that I go to my own school with my own sports teams to cheer for.
Grounds: This shirt would be bought by someone has gone to U Miami and how has a child that obviously must become nothing other than the most faithful and hardcore UM fan from birth.
Warrant: This shirt is trying to show the UM is the best and the only school that anyone should be a fan of.
Inference: Implies that if you start them off being a UM fan, they will be raised right and continue to be a UM fan for life.
Final Claim/Conclusion: The best and only way to raise your child is by having them be UM fans, most likely, just like their parents.