People do search and click on the link... if they didn't find the relevant information they move on and to next page or try to refit the query. So here is the catch. If the move on and click any link, it means earlier page had just noicy result that should be eliminated. Is it correct it does in the first attempt? No, don't trust single person. From my young age if I want to ask a route to some place, which I like to go, I normally ask more than a person.
There are 2 reasons,
1. person who answered could have lied
2. Double check will make sure that probability of error reduced. So if both person points two different directions, you need to be very careful. Ask few more....
So this is thingy I developed when I was young.
So why can't it be applied to search?