I apologize for not being more specific, you are in fact correct, if I did not realize that something was stolen property, I can not be accused of stealing. That's why I used an example such as a ming vase, something I am not expecting to find unless it was stolen from someone. (Sortof like when I "got" my 400W car amplifier... I can assume it wasn't stolen, just thrown out, but there it was, sitting in the grass next to a parking lot with torn wiring hanging from it...)

My point being that anyone who gives away copies of mp3's and who receives copies of mp3's knows darned well whether or not they legally have that CD at home, and obviously know whether they are breaking the law. Just because you didn't witness the act of ripping that CD, you know damn well that you don't own that CD. Therefore, you aren't just innocently in possession of stolen property. You knew what you were doing, and did it anyway. (You bad, bad boy!)