I read Henry Morris's rebuttal to isochrons in one of his books. It was like one paragraph long and it said that he didn't want to get into all the technicalities. Which means he didn't have anything better to say.
But he did mention, very briefly, pseudo-isochrons. Can someone explain to the ignorant-minded, namely me, what those are and how those are drawn?
Thanks a bunch- TTYL Jesus loves you!