In the sleep cycles there are two main stages, non-REM sleep and REM sleep.
If y is an infinity, rem returns x.
I prefer an alternative derivation from Latin " rem legere " meaning the " right thing " that one has to choose.
At the same time he has nothing to say against the Platonic theory of universalia ante rem (see Idealism).
The brilliant and enterprising Christian Thomasius brought out periodically, in dialogue form, his Monatsgesprdche (1688-1690), written by himself in the vernacular, to defend his novel theories against the alarmed pedantry of Germany, and, together with Strahl, Buddeus and others, Observationes selectae ad rem litterariam spectantes (1700), written in Latin.