You have a dream in which you see your favorite movie star in person. The very next day, you are visiting Manhattan and you see her walking down Fifth Avenue.
a. This is such an incredibly unlikely coincidence that you should report it to your local newspaper.
b. This is somewhat unusual, but given the many dreams you could have in your lifetime about people you know or know of, it is not an incredibly unlikely event.
c. If you had not had the dream, you would definitely not have seen the film star the next day.
d. This proves the existence of ESP.