[Lawtan]

?_?
As in what? In philosophy, it is possible to refute the existence of everything...so I'd be interested in what those things are (if only to challenge the above idea)

Essentially, the argument that if you can't prove something, it is best to assume it doesn't exist (Occam's Razor) leads to a debate on how does one prove something exists...and as both our senses and our minds are fallible, it is arguable that one can't be fully certain on the existence of...just about anything (Metaphysical Nihilism and/or Absurdism).

Sort of was my philosophy while in a state of deep depression, and while I admit it is impractical, and have moved back into being moderately functional with a less morose outlook on life, I have yet to gain knowledge that refutes the above. If geometry can refute this, I'll be a very happy person. :)