The precise boundary means nothing. Sure I understand the speculation about small changes adding up and supposedly given enough time a spec of caterpillar would evolve into fire-breathing dragon in my backyard. Sure, I'm with you.
So I ask you if you have enough faith to accept that amoebas became human beings - then do you have faith that Jesus died on a cross 2,000 years ago and rose from the dead?
OK, you are just plain ducking the question.
When it comes to science I have no faith whatsoever. I don't even trust my own observations, nor does any other scientist trust his.
When it comes to my Faith...it is none of your business.
Normally I give a response but not to those who challenge rather than ask. And never to those who consistently refuse to respond to my questions.
You're trying the "my faith is (stronger/better) than yours" game and that's one I don't play.