Okay, for the record, you are officially an antibeleiver who thinks simply asking the question and investigating it and trying to answer it makes one a nutter.
For the record, I hate this out-of-hand dismissal of anyone who asks "What if..." about anything outside the current Overton Window.
Antibeliever is someone who firmly believes the opposite though it's not actually scientifically proven.
For example, people who say Bigfoot or aliens are absolutely not real and anyone who believes in such is clearly a loon rather than saying "It's unproven and seems extremely unlikely."
For the record, I hate this out-of-hand dismissal of anyone who asks "What if..." about anything outside the current Overton Window.