I know exactly what Steve means. There are a lot of misconceptions about weight loss with two of the biggest being those mentioned here. The pound of fat and muscle thing is by volume but I don't think it is implied, I think people heard the statement and repeat it without thinking. The same goes from turning fat into muscle. It is physiologically impossible. Some other misconceptions are that a calorie is a calorie (nutritionally, not as a unit of energy), you can get rid of fat cells without having liposuction, large calorie deficits are better than small ones, cardio is better for burning calories than resistance training, and that walking burns a lot of calories. I think more people know more incorrect information about fitness and nutrition than they do correct information. Even the statement "eat less and move more" is only part of the equation. What you eat and how you move is just as important as the amount of each you do.