“The word ‘cause,’ ” the report read669, leaning heavily on Hill’s prior work, “is capable of conveying the notion of a significant, effectual relationship between an agent and an associated disorder or disease in the host. . . . Granted that these complexities were recognized, it is to be noted clearly that the Committee’s considered decision [was] to use the words ‘a cause,’ or ‘a major cause,’ . . . in certain conclusions about smoking and health.”
