%A MANI A %T "Possible De?nitions of an ?A Priori? Granule in General Rough Set Theory" by A. Mani %X We introduce an abstract framework for general rough set theory from a mereological perspective and consider possible concepts of ?a priori? granules and granulation in the same. The framework is ideal for relaxing many of the relatively super?uous set-theoretic axioms and for improving the semantics of many relation based, cover-based and dialectical rough set theories. This is a relatively simplified presentation of a section in three different recent research papers by the present author. %D 2009 %P 1-18 %L cogprints6639