But this question gets at the real crux of the problem because, for now anyway, there's really no way to find out. (sciencemag.org)
Reframing the debate in this way fails to get at the true crux of the problem: we have a dirty oil addiction, and the oil industry is inadequately regulated to the detriment of people's health. (treehugger.com)
... offers up the very crux of the problems surrounding the effectiveness of the outcomes of exams vis a vis what the graduates go out into the real world with, or not, under their knowledge belts. (remonline.com)