A amanda Active member Nov 23, 2011 #1 Is this argument valid or invalid: "Either that's a poltergeist or something weird is happening in the...? basement. That's no poltergeist. So, something weird is happening in the basement." Why is this argument valid or invalid?
Is this argument valid or invalid: "Either that's a poltergeist or something weird is happening in the...? basement. That's no poltergeist. So, something weird is happening in the basement." Why is this argument valid or invalid?