Of that number, 25 % of them use it as their sole method of accessing the internet. (inc.com)
Religion is the dogmatic following of rituals and customs as the sole method of practicing your belief. (religion.blogs.cnn.com)
Because symptoms are not reliable as the sole method of diagnosis, because there are so many symptoms that are nonspecific, which means they can apply to any number of different things. (kresserinstitute.com)