What does one reply to these statements about evolution:
1. Although there have been demonstrable changes within a species, there has never been any evidence to suggest that a species can change into a different species.
2. Most mutations are negative to the species and thus aren't advantageous to the theory of evolution.
These two questions seem to me to be the best arguments creationism (pseudo-science though it is) has to offer (I know they are arguments against evolution and not for design) and they are my only concern. I have no problem with not having the answer. I am of the mind that if science doesn't know something at the moment it will figure it out.
I would love to hear your thoughts.