What is both possible and impossible at the same time?

what one word does the below rebus identifies?

One night, Louis and Adam were sitting together. Adam was watching a movie while his wife Louis was reading a mystery book. Suddenly the power went out and Adam decided to go to bed, but strangely Louis kept on reading. There was no artificial light around, so Louis kept on reading. How come?

If your uncle’s sister is not your aunt, what relation is she to you?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Decode below rebus
D
N
A
T
S , D

The Judge knows that Alamgir was killed by his girlfriend Jasline, but the judge is unsure whether to punish her. Why?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Give it food and it will live; give it water and it will die.