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Explicit acknowledgement of message delivery may be accomplished by utilizing receipt messages . In fact , Guattari 's essay , " Regimes , Pathways , Subjects , " opening the volume , juxtaposes this sober acknowledgement of global misery with the utopian hope that a rebuilt subjectivity resulting from " planetary computerization " might transform hell into " a universe of creative enchantments . In a procession of cases brought by groups including former prisoners of war , " comfort women " , orphans and victims of germ warfare , there has been scant acknowledgement of their plight and no offers of compensation . A significant acknowledgement of the value of learning from experience was the institution in 1905 of formal laboratory work in high school science courses . Drawing a two-dimensional reality on a two-dimensional surface from a three-dimensional reality demands an experiential acknowledgement of both .