Following al-Farabi's lead, Avicenna initiated a full-fledged inquiry into the question of being, in which he distinguished between essence (Mahiat) and existence (Wujud). He argued that the fact of existence can not be inferred from or accounted for by the essence of existing things, and that form and matter by themselves cannot interact and originate the movement of the universe or the progressive actualization of existing things. Existence must, therefore, be due to an agent-cause that necessitates, imparts, gives, or adds existence to an essence. To do so, the cause must be an existing thing and coexist with its effect.
What did Avicenna start an inquiry into?
the question of being

The RIBA is a member organisation, with 44,000 members. Chartered Members are entitled to call themselves chartered architects and to append the post-nominals RIBA after their name; Student Members are not permitted to do so. Formerly, fellowships of the institute were granted, although no longer; those who continue to hold this title instead add FRIBA.
How many people have membership in the Royal Institute?
44,000

From the 1970s onward, Stuart Hall's pioneering work, along with that of his colleagues Paul Willis, Dick Hebdige, Tony Jefferson, and Angela McRobbie, created an international intellectual movement. As the field developed it began to combine political economy, communication, sociology, social theory, literary theory, media theory, film/video studies, cultural anthropology, philosophy, museum studies and art history to study cultural phenomena or cultural texts. In this field researchers often concentrate on how particular phenomena relate to matters of ideology, nationality, ethnicity, social class, and/or gender.[citation needed] Cultural studies has a concern with the meaning and practices of everyday life. These practices comprise the ways people do particular things (such as watching television, or eating out) in a given culture. This field studies the meanings and uses people attribute to various objects and practices. Specifically, culture involves those meanings and practices held independently of reason. Watching television in order to view a public perspective on a historical event should not be thought of as culture, unless referring to the medium of television itself, which may have been selected culturally; however, schoolchildren watching television after school with their friends in order to "fit in" certainly qualifies, since there is no grounded reason for one's participation in this practice. Recently, as capitalism has spread throughout the world (a process called globalization), cultural studies has begun[when?] to analyze local and global forms of resistance to Western hegemony.[citation needed] Globalization in this context can be defined as western civilization in other ways, it undermines the cultural integrity of other culture and it is therefore repressive, exploitative and harmful to most people in different places.
In the field that Stuart was working, what did he and his colleagues often concentrate on?
matters of ideology, nationality, ethnicity, social class, and/or gender