- Occam's razor: Simpler explanations are more likely to be correct; avoid unnecessary or improbable assumptions.
- Hanlon's razor: Never attribute to malice that which can be adequately explained by stupidity.
- Hitchens' razor: "What can be asserted without evidence can be dismissed without evidence."
- Hume's guillotine: What ought to be cannot be deduced from what is. "If the cause, assigned for any effect, be not sufficient to produce it, we must either reject that cause, or add to it such qualities as will give it a just proportion to the effect."
- Newton's flaming laser sword: If something cannot be settled by experiment or observation, then it is not worthy of debate.
- Sagan standard: Extraordinary claims require extraordinary evidence.
- Popper's falsifiability principle: For a theory to be considered scientific, it must be falsifiable.
- Grice's razor: As a principle of parsimony, conversational implications are to be preferred over semantic context for linguistic explanations.
- Garg, A. (17 May 2010). "Occam's razor". A.Word.A.Day. Archived from the original on 2014-03-09. Retrieved 2014-02-25.
- "Hanlon's Razor". The Jargon File 4.4.7. Archived from the original on 2011-04-30. Retrieved 2014-02-25.
- Miles, M. (2003). Inroads: Paths in Ancient and Modern Western Philosophy. University of Toronto Press. p. 543. ISBN 978-0802037442.
- Forrest, P. (2001). "Counting the cost of modal realism". In Preyer, G.; Siebelt, F. (eds.). Reality and Humean Supervenience: Essays on the Philosophy of David Lewis. Studies in Epistemology and Cognitive Theory. Rowman & Littlefield Publishers. p. 93. ISBN 978-0742512016.
- Mike Alder (2004). "Newton's Flaming Laser Sword". Philosophy Now. 46: 29–33. Archived from the original on 2017-12-04. Retrieved 2018-01-26.
- Hazlett, A. (2007). "Grice's razor". Metaphilosophy. 38 (5): 669. doi:10.1111/j.1467-9973.2007.00512.x.
- "Stanford Encyclopedia of Philosophy, Implicature". Implicature, 5. Gricean Theory. Archived from the original on 2016-12-11. Retrieved 2016-12-27.
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