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 argument ad feminam, all the old knives
that have rusted in my back, I drive in yours,
ma semblable, ma soeur!”
—Adrienne Rich (b. 1929)
“The trees stand in the setting sun,
I in their freckled shade
Regard the cavalcade of sin,
Remorse for foolish action done,
That pass like ghosts regardless, in
A human image made....”
—Philip Larkin (1922–1986)
“I have resolved on an enterprise that has no precedent and will have no imitator. I want to set before my fellow human beings a man in every way true to nature; and that man will be myself.”
—Jean-Jacques Rousseau (1712–1778)