Milking the bull is a proverb which uses the metaphor of milking a bull to indicate that an activity would be fruitless or futile. [1] [2]
In the 16th century, the German painter Hans Schäufelein illustrated the proverb on the eight of bells in a deck of playing cards. [3]
Dr Johnson used the proverb to criticise the work of David Hume and other skeptical philosophers. [4] [5]
{{citation}}
: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)