Sometimes it takes a while after many meetings to discover red flags that tell you this relationship is a dead end . Only then can you cross this person off your list of hopefuls.
But after much experience at this, I have developed a question that can eliminate most of the "dead end" candidates before the first face to face meeting.
Before a meeting is arranged, this question is presented to the woman: "On a scale of one to ten, how desperate are you ?"