Of two competing theories, the simpler explanation of an entity is to be preferred.
— Occam's razor
Never attribute to malice that which is adequately explained by stupidity.
— Hanlon's razor
What can be claimed without evidence can also be dismissed without evidence,
— Hitchen's razor
Extraordinary claims require extraordinary evidence
— Carl Sagan
When you have eliminated the impossible, whatever remains, however improbable, must be the truth
— Sherlock Holmes (Abductive Reasoning)