On a dark night, Harish and Priyanka were sitting together. Harish was watching a movie while his wife Priyanka was reading a mystery book. Suddenly, the power went out and Harish decided to go to bed, but strangely Priyanka kept on reading.
There was no artificial light around; Priyanka kept on reading.
How come?
Solution
Priyanka was blind and she was reading a book by Braille.
