A fundamental principle that should have been made explicitly clear a long time ago. I read it somehwere, probably on Rick's site.
If you lived in a world where you could choose what functions dominated, what would they be? The four choices are:
1.
2.
3.
4.
An alternative question would be; what functions do you find - from the list - most valueless?:
1.
2.
3.
4.
The likelihood is, you chose values from a corresponding quadra - subdued and dominant elements. I'm pretty sure you're clever enough to recognise the idea behind this.