Aristotle’s Square of Opposition … in Lojban

Here it is: one obscure type of logic expressed in an even more obscure type of logic! You’re welcome!

xusra natfe
kampu ro da poi broda cu brode no da poi broda cu brode
steci da poi broda cu brode da poi broda cu na brode

I wasn’t sure whether to render the O categorical sentence (bottom-right) as {naku ro da poi broda cu brode} or {da poi broda cu na brode}. It has been left as an exercise for the reader to determine whether they are logically equivalent.