My daughter did this. The doctor checked her out right at her 4th bday. She wouldn't use the potty at all. She would hold it. The doctor watched her playing for awhile and said that she was obviously very smart. The doctor took me to the side and said, " Take her home, put on undies, and tell her you aren't going to help anymore." I did as she said and my daughter was fully potty trained that night. I had to do the same when she wouldnt wipe....just tell her it was her problem. The doctor said that my daughter was smart enough to figure out that it was easier for her to act like she couldnt do it and have those issues taken care of for her. She had outsmarted me....and it wouldn't be the last time:)
