First, the government suggests that several of the assertions
in the intelligence documents are reliable because they are made
in at least three different documents. We are not persuaded.
Lewis Carroll notwithstanding, the fact that the government has
“said it thrice” does not make an allegation true. See LEWIS
CARROLL, THE HUNTING OF THE SNARK 3 (1876) (“I have said
it thrice: What I tell you three times is true.”).
Source: Page 28, Parhat v. Gates, US Court of Appeals for the 4th Circuit, 20 June 2008. (PDF)
Addendum: Check out the image used in the NY Times-ish coverage of the case. Also, note that the image is covered by a creative commons license. Huzzah!