Confidence votes 17. >as far as i know [which is not at all] the oldest in tact document we have collected are the dead sea scrolls<. I need to take exception to that answer. Most of the Dead Sea Scrolls aren't what could be considered intact documents, being mostly fragmentary.
On average, a girl is ready to be potty trained at approximately 29 months of age, says the University of Michigan Health System, compared to 31 months for the average boy.
Yet, according to the University of Michigan Health System, most girls are potty trained by 29 months -- about two months ahead of boys on average. There is no known reason that girls typically potty train faster than boys.