Re: Is this a neg and a flirt or a neg and "nice try"?
Agreed. It takes a lot of studying, observation, and practice, but once you are able to recognize the different IOIs of a girl, and when she is not showing them, then you would know how to act appropriately.
For example, the other day I was at a food place waiting to get my order. Next to me was this girl who I saw wearing a lanyard of a school that I was quite familiar with. I started up a conversation with her, and I discover a whole ton of sticking points and interesting and fun conversation topics to go off of. However, I did notice that her attention was not fully on me, her body was only slightly angled towards me, and she was constantly looking up to the front register to see where her food was. Knowing that this girl was a dud, I introduced myself, told her I might see her around, and then left for home.
It's seeing physical cues, and even picking up verbal and emotional cues, that can allow you to figure out what a girl is thinking inside of her noggin. From there, you can use this knowledge to best figure out what you should do next.
"There is no better than adversity. Every defeat, every heartbreak, every loss, contains its own seed, its own lesson on how to improve your performance the next time." - Malcolm X