You can use all the quantitative data you can get but you still have to distrust it and use your own intelligence and judgment.
A painstaking course in qualitative and quantitative analysis by John Wing gave me an appreciation of the need for and beauty of accurate measurement.
When someone says that I'm angry it's actually a compliment. I have not always been direct with my anger in my relationships which is part of why I'd write about it in my songs because I had such fear around expressing anger as a woman.