Don't believe everything even physicists say either. Even physicists, as godlike as they are, are known to make mistakes. The great Newton said light consisted of particles, not waves. Then it was found that they're waves. Then to really confuse the issue, it was found that they're particles on even days and waves on odd days (huh?). He said gravitational forces hold planets in orbit. Then Einstein said, "Not so. It's warping of space". There are many other examples throughout the history of science. Maybe 100 years from now we'll marvel at how naive Einstein's theories were.