Moving the goalposts
The phrase describes changing the target or goal of a process. In a dispute or a competition, the idiom explains what one side does in order to gain advantage.
Logical fallacy [change]
The idiom identifies a kind of logical fallacy. In an argument, when evidence is presented in response to a specific claim, it is "moving the goalposts" when some other evidence is demanded instead. Idioms are a common stumbling block for learners of a language.
In other words, after an attempt has been made to score a goal, the goalposts are moved to exclude the attempt. The problem with changing the rules of the game is that the meaning of the end result is changed too. It counts for less.
The tactics of bullying behaviour include moving the goalposts. This means setting objectives which subtly change in ways that cannot be reached. In workplace bullying, shifting the goalposts is a conventional tactic.
- Safire, William. "On Language; Moving the Goalposts," New York Times. October 28, 1990; excerpt, "This term is British,... and [it] means changing the terms of a debate or a conflict after it's been started"; retrieved 2012-2-16.
- Phrases.org.uk, "Moving the goalposts"' retrieved 2012-2-16.
- Clark, Jef et al. (2005). "Moving the goalposts," Humbug! The Skeptic’s Field Guide to Spotting Fallacies in Thinking, p. 101.
- Hobbs, Jeremy. "Moving the Goal Posts," New York Times, November 21, 2011; retrieved 2013-2-19.
- Royal College of Psychiatrists, "On Bullying and Harassment" retrieved 2012-2-19.
- Field, Tim. (1995). Bully in Sight: How to Predict, Resist, Challenge and Combat Workplace Bullying, p. 60.