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This paper is to show how the articulated analyses for infinitives shed new light on what the nature of EPP is. This paper tries to give an answer to the question whether EPP can be reformulated in terms of feature inheritance. I utilize two hypotheses: the hypothesis for the extended feature inheritance of the C-T category, and the split C and T hypotheses. In this paper, I propose that the extended feature inheritance of the C-T category includes the edge feature EPP as well as Agree and Tense features. The EPP is newly reformulated in terms of C-to-T feature inheritance: C-to-T feature inheritance is obligatory for EPP. The analyses of infinitives to investigate EPP show that English infinitives fall into three basic classes: sole ToP for raising, VP-ToP for ECM, and CoP-ToP for control and for-infinitives.