What is an idiot?

I got a great example of an idiot. My ex has proven once again that she has no clue. I haven't called my son past 7pm in ages since I simply do not want to talk to my ex and so often he has been asleep early. Well she has decided that I have called from a phone other than my own and left my son a message (WRONG!) and then someone is calling her from this number and Harrissing her. Only an idiot would not be able to check the call log of the phone and have seen that my call comes from my phone and that if another call comes in that the message from earlier wasn't from some strange number. She made this big deal about this Harrissing call and when I ask to get the number to see for my self if she was getting calls from someone I know, she said "your not worth it"
I guess she once again wants to be able to stick to the truths she creates and not find out that she was wrong just like she fabricated that I had a girlfriend before she announced that she filed for a divorce.