An eminent scholar recently brought the following quote to my attention. My more philosophical co-bloggers will be better than I am at explaining why this constitutes an example of illogic, by making opposites of two perfectly reconcilible options.
It is disgusting to notice the increase in the quantity of coffee used by my subjects, and the amount of money that goes out of the country as a consequence. Everybody is using coffee; this must be prevented. His Majesty was brought up on beer, and so were both his ancestors and officers. Many battles have been fought and won by soldiers nourished on beer, and the King does not believe that coffee-drinking soldiers can be relied upon to endure hardships in case of another war.
Frederick the Great of Prussia (1777)
Laodicea 
October 30, 2014 at 8:09 am
A part of me is inclined to applaud the Prussian monarch for his conservative opposition to useless innovations, but then I reflect on how difficult the morning office would be without caffeine…
November 1, 2014 at 10:37 pm
But is not this exactly the problem of mere (social) conservatism, to oppose novelty just because it is new? As you yourself admit, coffee serves a purpose that beer can not.