First off I said pretty irrefutably, but yes, the case is very strong. Everyone’s objections boiled down to “but that’s not what I always thought!”
I showed how Ruth didn’t fit the parameters of a Levirate marriage; how the text didn’t claim it was a Levirate marriage, and what the text did focus on, Naomi’s land and its disposition.
We can’t only be about restoring the centrality of God’s Word through a literal interpretation when it means we get to have sex with multiple women. It has to permeate every topic. All of our assumptions have to be on the chopping block. Ruth pretty much can’t be a Levirate marriage by any application of the scriptures we’re given about her situation or the particulars of Levirate marriage.