Among these truths, verbal communication is at the heart of this study: Axiom 1, Verbal Communication: Given the high level of uncertainty present at the beginning of the phase input, as The amount of verbal communication [emphasis added] between strangers increases, the level of uncertainty for each element of the relationship will decrease. As uncertainty decreases, the amount of verbal communication will increase. (p. 127) Once again we find that the key factor in the development of interpersonal relationships is verbal expression in person.