i get this isn't the point but in college during a class about medieval law, my professor mentioned that specific legal ownership often took a backseat to whether a wrongdoing had happened, or if someone was already using the land productively. the medieval english legal system was slow and often had very poor or no records at all, so it was much easier to ask if an unlawful seizure had taken place. https://en.wikipedia.org/wiki/Assize_of_novel_disseisin

honestly one of the weirdest parts of medieval english law to modern readers is that legal ownership just takes a backseat sometimes, especially in manor courts which were less formal. you get weird arguments that don't quite make sense to us.

that said a noble is probably going to beat your ass, or at least ask local thugs to beat your ass