Can you explains the knitpicking? They specifically decided that only objects orbiting our star can be Planets. It wasn’t an oversight but intentional. How can that be explained? Why do that?

Also, how can mercury be explained? It clearly violated one of the 3 rules with no given exception other than they just decided it can be a planet. Why?

25% of the 8 objects they wrote rules for needed an exception to make the cut. That doesn’t seem odd?