A man buys a lie detector robot

A man buys a lie detector robot that slaps people who lie.

So he decides to try it out at dinner.

DAD: Son, where were you today during school?

SON: At school robot slaps son.

SON: OK, I went to the movies.

DAD: Which one?

SON: Toy Story robot slaps son again.

SON: OK, it was A Day with a impurity Star.

DAD: WHAT?! When I was your age, I didn’t even know what impurity was Robot slaps dad.

MOM: HAHA!! After all he is your son, Robot slaps mom.