Science presumes them to be invalid, not because they have been proven invalid, but because they have not yet been proven valid. This is what makes science so powerful and so dynamic. If you can prove that your theology or your parapsychology or your witchcraft or whatever is genuinely valid, science will eventually accept it. Sorry to disappoint you, folks, but science is not God. Science did not create the universe.
Science is our way of finding out about our wonderful universe.
Science is limited to what can be known by rational thought backed up by verifiable observations. If you can verify your observation and can prove the validity of your rationale, science will accept it. Visit my opinion forum to re-instruct me in Ultimate Truth, or whatever.