Is an affidavit sufficient to establish probable cause for a search warrant?

The standard by which a magistrate must determine whether an affidavit is sufficient to establish probable cause for issuance of a search warrant is explained in Illinois v. Gates (1983) 462 U.S. 213, 238-239, 103 S.Ct. 2317, 2332, 76 L.Ed.2d 527, 548: "The task of the issuing magistrate is simply to make a practical, commonsense decision whether, given all the circumstances set forth in the affidavit before him, including the 'veracity' and 'basis of knowledge' of persons supplying hearsay information, there is a fair probability that contraband or evidence of a crime will be found in a particular place. And the duty of the reviewing court is simply to ensure that the magistrate had a 'substantial basis for ... conclud[ing]' that probable cause existed."