Four tablets that are identical to the touch, two colors that are impossible to distinguish, and the obligation not to make mistakes. There is a way out, but it requires rethinking what it means to “take a pill.”
The mixed pills
Riddle statement
A person must take one blue and one red pill every day.
There are exactly two blue and two red pills left. By accident they mix and you can no longer distinguish one from the other.
You can't risk taking two of the same color in one day.
Can you still ensure the correct dose for two days?