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Whilst there are many subtle variations possible in the form of delivery , for example , the kind of search that is made possible , this analysis focuses upon some macro distinctions which appear to be of major concern to users and to discriminate between the disciplines . In watching objects interact , babies less than a year old distinguish causal events from non-causal ones that have similar spatio-temporal properties ; they distinguish objects that move only when acted upon from ones that are capable of self-generated motion ( the inanimate / animate distinction ) ; they assume that the self-propelled movement of animate objects is caused by invisible internal states - - goals and intentions - - whose presence must be inferred , since internal states cannot be seen ( Baron-Cohen , 1995 ; Leslie , 1988 ; 1994 ) . The public-versus-private distinction is by convention , not syntax . More and more institutions will establish extensive partnerships with vendors and with other institutions to enrich their online curricular offerings and to create organizational distinction and comparative advantage in a competitive environment .