A woman in a light blue shirt with white sleeves cuts a watermelon .
It is certain that a woman in a blue and white shirt cuts watermelon at a party .
Chances are about even that a woman in a blue and white shirt cuts watermelon at a party .
It is certain that a woman in a blue and white shirt cuts watermelon at a party .
A woman in a blue and white shirt cuts watermelon at a party .