Rob Mann
When we can measure what you are speaking about in numbers, you know something about it; but when you cannot measure it or express it in numbers your knowledge is of a meagre and unsatisfactory kind.
Lord Kelvin
When we can measure what you are speaking about in numbers, you know something about it; but when you cannot measure it or express it in numbers your knowledge is of a meagre and unsatisfactory kind.
Lord Kelvin