Lewis taught briefly at UCLA and then at possible worlds exist, ( ii ) every possible world is a concrete entity, ( iii ) any possible world is causally and spatiotemporally isolated from any other possible world, and ( iv ) our world is among the possible worlds.
12.
New Guinea then became a more concrete entity to these seafarers from Portugal ( and later, the English, Spanish and Dutch ), but though it loomed large in the region, attention was focused on a handful of minuscule spice producing islands, among others Ambon and Banda, located a stone's throw west of Irian.
13.
According to nominalists ( Roscelin of Compi�gne, William of Ockham, Bernard of Chartres ), universals aren't concrete entities, just voice's sounds; there are only individuals : " " nam cum habeat eorum sententia nihil esse praeter individuum [ . . . ] " " ( Roscelin, " De gener . et spec . ", 524 ).
14.
James Crutchfield, a theoretical physicist who was an adviser for the " Turbulent Landscapes " show, which runs through Jan . 5, points out that while people tend to think of tornadoes, sand dunes and the like as fixed, concrete entities, they _ like societies and people themselves _ are instead " patterns of interaction and organization " that are unpredictable yet highly ordered.
