A man in a red shirt is standing next to a woman in a blue dress. They are both holding hands and smiling at each other. Bicyclist checking to make sure that his teammate is behind him. His teammate is a stranger. A person is wearing a red hat. They are also wearing a blue shirt. If they are not wearing a red hat, they are not wearing a blue shirt. If they are not wearing a blue shirt, they are not wearing a red hat. Does it logically follow that the person is not wearing a red hat?
yes
it is not possible to tell
no