"Are you trying to claim that you know for certain mountains aren’t sentient?" We don't know anything for sure. Philip k. Dick believed the modern world was a

"Are you trying to claim that you know for certain mountains aren’t sentient?" We don't know anything for sure. Philip k. Dick believed the modern world was an illusion created by Satan and it was actually the year 50 AD. But if I keep posting "How do you know computers aren't an illusion created by Satan?" anytime someone wants to discuss computer software I probably deserve to be laughed out of the conversation.