Magnetic fields wax and wane, even on Earth as shown by rock evidence of fossil magnetic fields over millions of years. Take off your blinders and use real science.
I got the rate of decrease by comparing my theory’s magnetic moment at creation with the 1975 value, and by using a 6,000 year age for the solar system, as the blue line in Figure 2 illustrates.
This is utterly laughable. The author invented a number based upon his own "theory" and then drew a straight line between a known datapoint and his theoretical datapoint and claims that the line proves something.
Seriously, I'm rolling on the floor here.