It's a Mountain Lion! It's a Puma! It's a Cougar! (It's the Same Thing!)

So my sis-in-law got into it with some smart-mouth 10-year-old girl at the zoo. Okay not really, but I think it was close. Ha! Someone in our group says, "It's a cougar!" Jessi replies, "It's a mountain lion!" The little girl turns around and goes (with attitude), "It's the same thing!" She continued to stare at Jessi waiting for an acknowledgement of her wisdom. (It didn't happen.)