Me? 4
Reality is unstable for instance:
"Right now there are 1.2 million or so known living species. Some 15,000-20,000 are added to the list every year. This may seem a lot but there are plenty more to find"
400 years ago you may have been interred in a mental institution for declaring the world was round and orbited the sun, in another 400 years people will be looking back at records of ancient on line Forums and rolling their eyes too.
“A mind is like a parachute. It doesn't work if it is not open.”