A man walking in the desert wearing a hat , khaki shirt and shorts and very dark sky ahead of him .
It is certain that a man is walking around in a desert where it 's about to rain .
It is unlikely that a man is walking around in a desert where it 's about to rain .
It is certain that a man is walking around in a desert where it 's about to rain .
A man is walking around in a desert where it 's about to rain .