" The greatest thing about provable reality is that by definition reality is shared. Every argument is really an agreement—an agreement that there is a reality that can be shared, judged, and discussed. To argue over whether the speed of light is constant or Batman could beat up the Lone Ranger is to share the parameters. God is solipsistic; reality is shared. "

― Penn Jillette , God, No! Signs You May Already Be an Atheist and Other Magical Tales