It leaves no room for bone mass, muscle mass and the amount of fat in the body. Indeed, “bones are denser than muscle and half as dense as fat, so a person with strong bones, good muscle tone and low fat content will have a high BMI (Delvin)”. Additionally, based on personal opinion, using basic logic, flaws can be found in the BMI system. Its founder, Adolphe Jacques Quetelet, asserted in the 19th century that his system should not be used to determine a person's body fat percentage. For example, if I said that my Easter gift was a book, we might conclude that it has pages. But if I say that my Easter gift had pages, we cannot conclude that it was a book, as it could have been a magazine or a newspaper. Likewise BMI and obesity. An obese person will have a high BMI. But a person with a high BMI is not necessarily obese and may simply be healthy with low body fat, even with the bacteria lurking in their body.