Comfort theory is comprehensive and understandable. Because Kolcaba (2003) believed that consumers of theory should be able to understand and use theory, theory-specific terminology is well described with minimal or simple definitions. All concepts are defined theoretically and operationally. Operational definitions allow comfort to be measured and hypotheses to be tested. Although the definitions, derivations, hypotheses, and propositions have evolved over the 20 years since the theory was introduced, they remain consistent. As mentioned previously, this author's literature search revealed a discrepancy between some references referring to comfort theory and others referring to comfort theory. Various texts also report a contradictory number of proposals. Despite the inconsistency in the number of propositions reported, the basic principles of the theory and propositions remain