Loki's wager is the unreasonable insistence that because two or more categories exist as poles on a spectrum with a grey area in the middle, the distinction between the two cannot be defined.
According to the Prose Edda (Skáldskaparmál ch. 35), the Norse god Loki once made a bet with the dwarf Brok, and wagered his head. He lost, and in due time the dwarves came to collect. Loki had no problem with giving up his head, but insisted they had absolutely no right to take any part of his neck. Everyone concerned discussed the matter; certain parts were obviously head, and certain parts were obviously neck, but neither side could agree exactly where one ended and the other began. Loki kept his head indefinitely, although his lips were stitched shut as punishment for getting out of the bet with tricky wordplay.
- Sorites paradox
- Draupnir – The gold ring at the center of the myth
- Fuzzy concept
- Merchant of Venice – specifically how the 'pound of flesh' agreement was nullified
- Moving the goalposts
- Quibble (plot device) – The use of the fallacy as a plot device
- Boudry, Maarten (January 2014). "Loki's Wager and Laudan's Error: On Genuine and Territorial Demarcation". Philosophy of Pseudoscience: Reconsidering the Demarcation Problem. University of Chicago Press: 79–98. doi:10.7208/chicago/9780226051826.003.0006.
- Guerber, H. A. (1909). "4: Thor. Sif, the Golden-haired". Myths of the Norsemen From the Eddas and Sagas. London: George G. Harrap & Company. pp. 59ff. Retrieved 7 January 2023.