Math Riddle in Combinatorics. A blind man is on a strange island and he has 2 red pills and 2 white pills, completely identical and has kept in his pockets, he needs to take 1 red pill and 1 white pill order doesn't matter.  If he takes 2 pills of the same color he dies.  How does he survive.  There is a standard solution for this and I was wondering if there could be a combinatorial way to solve this?
Break each pill in half, and take half of each pill.
Just take a glass of water, fill it to the brim.
Put all the pills inside, they should dissolve well, all pills will dissolve well, drink half the glass of water, even a blind man can tell, problem solved.