Stick with it--I know you can do this!
A thirsty person has a lovely 22 oz. glass with some ice cubes in it. She has one-quarter of a 24 fl. oz. bottle of Diet Pepsi
and an unopened 12 oz. can of Diet Coke.
If she pours all the Diet Pepsi into the glass, and then fills the remainder of the glass with Diet Coke, does the resulting class of trademarked brands interact like matter and anti-matter and bring about the end of time and space as we know it? Or does the presence of the ice cubes operate as dilithium crystals, making faster-than-light speeds possible?