A man ordered a voice automated robot car that did anything he told it to do correctly without any error. 

He got the car and started sending it on errands. He became very proud of what the car could do without mistakes. 

One day, he was home and his wife told him to tell the car to go and pick their 3 children from school as she was very tired. 

The man agreed and said to the car, "Car, go and bring my children from school." 

When the car didn't return in time as expected, they knew something must be wrong. Several hours later and still no car, the man became apprehensive. 

He got dressed and was ready to lodge a report at the police station.

As he and his wife stepped outside, they saw the car with a full load of children. 

The car parked right in front of them and said, 
"Here are your
children, sir."

In the car were their landlady's two daughters, their choir mistress's two sons, his wife's best friend's daughter, their pastor's son and their neighbour's two sons. 

The Wife said, "Don't tell me all these are your children?" 

The man asked her calmly, "Ann, you tell me first. Why are our children not in the car?"