Yep, going from a simple system to a complex system is more often than not, a thing that would have to evolved in one jump. The eye, and the brain-eye-analyzing complex have to upgrade at the same time. And that requires not a simple mutation, it requires a bunch of mutations and then it being passed on to offspring. So, this one in a multi-billion chance may have to happen several times.

The time this takes is longer than the universe has been around. And so, as you have stated, debunked.

What i hate on the math front is that they teach you calculus to shut your brain down from finding obvious problems with mathematics. They say asymptotic before (never gets there) to integrates after (gets there always)