The converse of PrightarrowQP \\rightarrow QPrightarrowQ is:
negQrightarrownegP\\neg Q \\rightarrow \\neg PnegQrightarrownegP
QrightarrowPQ \\rightarrow PQrightarrowP
negPrightarrownegQ\\neg P \\rightarrow \\neg QnegPrightarrownegQ
PleftrightarrowQP \\leftrightarrow QPleftrightarrowQ