[@Etcetera] The first thing mentioned in every description of every one of the three main sections is post-length. It is not my own subjective judgment that has decreed that post length is the primary distinguishing factor of the sections, but rather both the section descriptions themselves and the entire collective consciousness of every member of RPG who is not named Etcetera.

If an RP's IC section is one-liners, it's a Free RP. If that same RP is posted in Casual, it's a Free RP posted in Casual.