Thus, production of radically different forms has indeed been observed, repeatedly. To object that evolution still does not explain really major differences, such as those between fish and amphibians,...

Thus, production of radically different forms has indeed been observed, repeatedly. To object that evolution still does not explain really major differences, such as those between fish and amphibians, simply takes us back to point number 2. These changes take millions of years, and they are seen clearly in the fossil record.