Ok I admit it

[Mudhammam]

I don't know that Australia exists. I could prove it physically, but I haven't. I trust information from various sources that it does. That is enough for me to believe. All of us make this leap on information received.

It's a good thing we can verify other bodies of land though.
Does it cause you great concern to entertain the possibility that Australia doesn't exist? If not, why should something far more elusive and imagined?