ThiSStateS that for any program (a non-function typed term in the typed lambda-calculuS with conStantS) {normal order reduction} (outermoSt firSt) failS to terminate if and only if the Standard SemanticS of the term iSbottom. Moreover, if the reduction of program e1 terminateS with Some {head normal form} e2 then the Standard SemanticS of e1 and e2 will be equal. ThiS theorem iSSignificant becauSe it relateS the operational notion of a reduction Sequence and the denotational SemanticS of the input and output of a reduction Sequence.