Argument from precedent is a common argument in discussion, often used by committees or in meetings. It consists in saying that to act correctly in circumstances X would be inadvisable, in case others consider that this would set a precedent for acting in circumstances Y, where (it is argued) X and Y are superficially similar but (on close examination) are radically different. The Microcosmographia Academica, published in 1908, cited this as one of the reasons why "nothing should ever be done for the first time".
The fallacy is similar to the slippery slope argument.
Famous quotes containing the words argument, setting and/or precedent:
“The difficult part in an argument is not to defend one’s opinion, but rather to know it.”
—André Maurois (1885–1967)
“Many working mothers feel guilty about not being at home. And when they are there, they wish it could be perfect.... This pressure to make every minute happy puts working parents in a bind when it comes to setting limits and modifying behavior.”
—Cathy Rindner Tempelsman (20th century)
“I am heartily tired of this life of bondage, responsibility, and toil. I wish it was at an end.... We are both physically very healthy.... Our tempers are cheerful. We are social and popular. But it is one of our greatest comforts that the pledge not to take a second term relieves us from considering it. That was a lucky thing. It is a reform—or rather a precedent for a reform, which will be valuable.”
—Rutherford Birchard Hayes (1822–1893)