He claims there is proof ghosts exist and such.
His argument is that we just have not invented the means to detect them.
These two claims seem inconsistent. If we can prove they exist then we can detect them.
He claims the EVP(electronic voice phenomena" is hard evidence of ghosts.
"Hard" is an exaggeration. Hearing words in EVP is like seeing faces in clouds.
And if it is real, why should it be evidence of ghosts in particular? Maybe it's people from the future trying to perfect their transtime communicator ... or bits of the cosmos spontaneously becoming conscious through [make up something involving the word "quantum" and insert here] ... or leakage from a parallel universe ... or Carl Sagan's invisible dragon trying to let us know that it does exist after all ... or the same race of mischievous pixies that puts all those pictures in clouds. Just because for some reason believers in ghosts are particularly interested in listening to this aural goop doesn't mean that it is particularly likely to be in fact produced by ghosts.