1. No. But you can work out if it exists.
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.
2. Detect it at all physically?
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.
2. Detect it at all physically?