> Yes, if you ask me for any rectangle, and you reject a square, you are wrong Intuitively it makes sense, but practically... What if your function wants to se

> Yes, if you ask me for any rectangle, and you reject a square, you are wrong Intuitively it makes sense, but practically... What if your function wants to set the width and the height to different values? This is valid for a rectangle, not for a square. From a mathematical perspective, a square might be a rectangle. From a software standpoint, it's not. The reason for the discrepancy between mathematics and programming? Mutability.