Norrin: On the other hand, the ***umption that *some* form of inspired utterance -- usually "tongues," but sometimes prophecy -- is not normative for all makes it impossible to understand Acts 2, 10:46, 19:6; 1 Cor. 14:5, 23, 26.

How so? Some speak in tongues, and some don't. How does that conflict with any of the verses you mention above?