Just who's right is a matter of considerable debate. (inc.com)
It is necessary to say something here about the place of metaphysical analysis in the discussion of love because the very possibility of metaphysical knowledge is a matter of considerable debate at the present time. (religion-online.org)
Many of the glaciers that jut out into the ocean are thinning, but whether the ice sheet itself has remained stable and intact, even during warm interglacial periods, is a matter of considerable debate. (sciencemag.org)