Thats an interesting question. Why do you want to know that?
There is no symptoms of virgin or non virgin unless you go for the test. And the test is put your dickometer on the vagina.
Virgin and non virgin doesnot have any distinguishing feature. You have to trust their words, thats all. Either there is, be sure all unmarried girls have excelled on that and can pretend the same way, all married need not pretend. If you have that much knowledge on pretence or not, I would pray that you be the judge in Oscar awards.
I saw here some guy challanged he can say between virgin and non-virgin, I hope he can open a consulting business very soon. A lot of guys with wide sex experience when they go for marriage, they look for a fresh pussy. They are all his future customers