Avicenna's consideration of the essence-attributes question may be elucidated in terms of his ontological analysis of the modalities of being; namely impossibility, contingency, and necessity. Avicenna argued that the impossible being is that which cannot exist, while the contingent in itself (mumkin bi-dhatihi) has the potentiality to be or not to be without entailing a contradiction. When actualized, the contingent becomes a 'necessary existent due to what is other than itself' (wajib al-wujud bi-ghayrihi). Thus, contingency-in-itself is potential beingness that could eventually be actualized by an external cause other than itself. The metaphysical structures of necessity and contingency are different. Necessary being due to itself (wajib al-wujud bi-dhatihi) is true in itself, while the contingent being is 'false in itself' and 'true due to something else other than itself'. The necessary is the source of its own being without borrowed existence. It is what always exists.
According to Avicenna, what could eventually be actualized by an external cause?
contingency-in-itself

Radio stations played Top 40 hits regardless of genre; although, most were in the same genre until the mid-1970s when different forms of popular music started to target different demographic groups, such as disco vs. hard rock. This evolved into specialized radio stations that played specific genres of music, and generally followed the evolution of artists in those genres.
What genre of music was was listening to by a different demographic than hard rock?
disco

The Boston Globe wrote that "if there's one school that can lay claim to educating the nation's top national leaders over the past three decades, it's Yale." Yale alumni were represented on the Democratic or Republican ticket in every U.S. Presidential election between 1972 and 2004. Yale-educated Presidents since the end of the Vietnam War include Gerald Ford, George H.W. Bush, Bill Clinton, and George W. Bush, and major-party nominees during this period include John Kerry (2004), Joseph Lieberman (Vice President, 2000), and Sargent Shriver (Vice President, 1972). Other Yale alumni who made serious bids for the Presidency during this period include Hillary Clinton (2008), Howard Dean (2004), Gary Hart (1984 and 1988), Paul Tsongas (1992), Pat Robertson (1988) and Jerry Brown (1976, 1980, 1992).
What well known presidential candidates also studied at Yale?
Hillary Clinton (2008), Howard Dean (2004), Gary Hart (1984 and 1988), Paul Tsongas (1992), Pat Robertson (1988) and Jerry Brown (1976, 1980, 1992).