premise: Libya's case against Britain and the US concerns the dispute over their demand for extradition of Libyans charged with blowing up a Pan Am jet over Lockerbie in 1988.
hypothesis: Libya has held it's case against Britain and the US for extradition of Libyans regarding destruction of a Pan Am jet for over 52 years.
reason: If the Pan Am jet was blown up in 1988 then the case for extradition on such charges cannot have been made more than roughly 30 years ago.