Guys, this argument is not valid because everyone is taking smart to mean something different.
Some of you are being trite and calling 'smart' using all of your abilities and achieving your best. This is not what this thread is about.
In this context, naturally smart is used to refer to those who can grasp a concept easily and not need to do the amount of study some people need to do to achieve reasonable marks.
Of course there are people who are both naturally smart and smart in the sense that they work to the best of their abilities. These are generally the people who achieve 99+
I am not a 'tosser' because I admit that I am naturally smart but lazy. I accept this as a trait within myself, and am quite happy with the marks I achieve relying mostly on my natural ability. I know I could achieve better with harder work, but this is just not in me.