Although a spin - liquid state has previously been observed in herbertsmithite, there has never been a detailed analysis of how the material's electrons respond to light — a key to determining which of several competing theories about the material is correct. (sciencedaily.com)
A crisp image can tip the evidentiary scale toward one of several competing theories about the identity of a cellular or tissue feature, how it is structured... (hhmi.org)
Wright does a good job of examining and dismantling several competing theories that have become prevalent in Western Christian thought: (rachelheldevans.com)