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To me, the declarative method is essentially the method adopted by Bill Bright in "The Four Spiritual Laws". Most would argue that this is not as effective in the postmodern generation—a generation that is more concerned about "belonging" than "understanding".
As for Schaeffer's method (see original article), it seems to me it is still rooted in a modernist mode of thinking. I find the postmodern seekers of faith are not too concerned about logical inconsistencies and incoherences. They are accustomed to living in a pluralistic and relativistic age, hence logical inconsistencies and apparent contradictions do not really bother them. I suppose that's why the Eastern religions (which have no emphasis on reason) are gaining in popularity.
To minister to the postmodern generation, I think we must adapt these methods by considering the importance of the role of community.