My main problem with this article is how is:

Live exclusively with each other as husband and wife

Defined?

Does girl and boyfriend count? What if the one of them does not have the intention of marriage but only wish to be girl or boyfriend? Will there co-habitation still count as common law marriage?

I know this may not be a Men's right exclusive topic, but I still wish to ask here, because I feel this sub is less biased against men when came to these types of question.