You can play a lot of thought experiments about scientific experiments to test if the table disappears. As far as I know at this time, they all devolve into the brain-in-a-vat or the bad-actor solution (although I may have the names mixed up). The brain in a vat is we're brains in a vat connected to a really high end "second life" computer server. The bad actor argument boils down to some god is testing our faith by trying to fool us (usually heard about fossils, or the earth being round, etc)