(January 6, 2015 at 12:11 pm)FatAndFaithless Wrote: But how can your conclusion be "all pools of water are artificial" if you haven't examined "all pools of water"?
How do you know the speed of light in a vacuum is constant if you haven't measured the speed of every photon travelling through a vacuum?
For AlexK and Surge: Maxwell's equations don't tell you because then the question becomes how do you know the permeability and permittivity of free space are constants if you haven't measured those values for every point in space?