abstruse

For this easy deductive reasoning makes esotericism seem altogether reasonable: the experts speak abstrusely to one another and have a simpler language for those who have no need for the finer points of truth.

As Proust's text indicates, it was a commonplace that Mallarme expressed his ideas clearly in speech and abstrusely in writing (Proust 63).

Unfortunately Mugabe who symbolizes the political leadership, was not ready to read his political obsequies or was he just abstrusely stubborn to make a paradigm shift.

Simple puzzles turn up on occasion and briefly impede progress, but more often turn out to be abstrusely complex.