But for the mind to play tricks on you, you have to believe there can be something there to begin with right? You cant have a trick played on you, if you dont believe in the trick to begin with. You have to be paranoid that something is there, for your mind to believe it can truly be there.
Your explanation for everyone being tricked is basically, "Everyone either has an overactive imagination or....." When the truth is, many credible witnesses have come forward. People who live near bears all theyre life know what is, and what isnt a bear.
To dismiss every single persons testimony ever as "a trick played by the mind" is to say that we cant use them in criminal trials, because they could have been fooled, or tricked into thinking it was somebody, because they saw a picture of that person.
And the fact that there is no proof of ghosts doesnt prove they dont exist, same goes with bigfoot, nessy, and aliens. Were finding new species everyday. Ever species we thought were looooooong extinct. Coelacanth, Lord Howe, and Cuban solenodon were all thought to be completely gone off the face of the earth.
Whos to say Gigantapithecus is? ((giant ape that walked on 2 legs))
To dispute that something doesnt exist because of lack of evidence is to be closed minded xD We get new evidence every day. Just look at dark matter. We thought it wall as science fiction until we found out it made up the majority of the universe.
While yes, my belief is different ((and i cant stress that enough)), its not as far fetched as you'd think. Its an explanation for how they could exist.
You cant offer proof its wrong!

So i must be mostly right! (basically what your saying)
A logical and rational person dont need proof to believe it exists. They use their logic and ration to find proof. ((either in favor, or to the contrary.))