There is a really good treatment of the Word of Wisdom that discusses a number of the restrictions provided in D&C 89. https://history.lds.org/article/doctrine-and-covenants-word-of-wisdom?lang=eng In that essay, it points out that coffee had become a popular substitute for whiskey, but that D&C 89 rather flatly rejected the notion of a need for a whiskey substitute.  When the words "hot drinks" were written, it was culturally understood that this meant coffee and tea. The expl