What is the probable cause standard in the context of searches and seizures?

^16. The probable cause standard is inherently "incapable of precise definition or quantification into percentages because it deals with probabilities and depends on the totality of the circumstances." Maryland v. Pringle, 540 U.S. 366, 371 (2003). Nevertheless, "the substance of all the definitions of probable cause is a reasonable ground for belief of guilt, and that the belief of guilt must be particularized with respect to the person to be searched or seized." Id. (citations and quotations omitted).