I know what probable cause is and how it is used in law/law enforcement. But what does the actual term "probable cause" mean?
In a sentence where it is used like
"The drug dog's alert gave me probable cause to search your vehicle"
in this case the officer has "definite cause" why is probable used?
In the wikipedia definition it says:
"Probable" in this case may relate to statistical probability or to a general standard of common behavior and customs
But that is also very vague, "statistical probability" or "general standard" of what? Statistical probability of, in the given example, having drugs? How does that relate to giving cause?
It just seems like any way you try to interpret the word "probable" it doesn't make sense, you either have cause to search/arrest/etc. or you don't where is the probability?