I read WP:NOR. But,  these OR are comparison of two Wikipedia articles (http://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equations and http://en.wikipedia.org/wiki/Helmholtz_decomposition ). These articles conflict with each other. In Wikipedia all contradictions must be deleted. If it not maybe that such contradictions can not be hidden. It is necessary to write about them. Otherwise it is Wikipedia disrupting