Use your favorite search engine or actual printed material and you will discover more than one way to knit anything. Take the Broken Rib for example. There is this version here and also this one over there.
By alternating the right and wrong sides of the Broken rib across the width and also along the length, a lovely bit of textural knitting happens. I'm thinking it would be quite manly if done in a manly color way such as grey or brown.
What I like is that the result is totally reversible. That matters in a scarf that will twist and wrap and bunch and generally not behave well.
Which side is the obverse? Which is the reverse?
Don't fret over the quandary because they are both perfect!