Jokey on white or light gray horse is jumping over a hurdle of yellow , white and black poles .
It is impossible that the jockey is drunk and causes his horse to jump hurdles that are n't his .
It is impossible that the jockey is drunk and causes his horse to jump hurdles that are n't his .
It is certain that the jockey is drunk and causes his horse to jump hurdles that are n't his .
The jockey is drunk and causes his horse to jump hurdles that are n't his .