A proverb indicating a fruitless task
Milking the bull is a proverb which uses the metaphor of milking a bull to indicate that an activity would be fruitless or futile.
In the 16th century, the German painter Hans Schäufelein illustrated the proverb on the eight of bells in a deck of playing cards.
Dr Johnson used the proverb to criticise the work of David Hume and other skeptical philosophers.
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