you're not a person of faith from what you've said, so your response comes from what you believe, just as mine comes from what i believe. both of us are on shaky ground when it comes to looking for definitive, irrefutable, concrete evidence to support our viewpoint.
because of my belief in a divine God, i also believe that there is a devil. i believe that is part of the balance that exists throughout the earth (where there is good there is also bad, where there is heat there is also cold, etc.). because of that belief, and because of the things i believe that satan is capable of doing, i have no problem with the idea that a theory like evolution could have been suggested to darwin by satan in some form. i believe that because i think one of satan's primary purposes is to cause humans to doubt God and who He is. that's why i think there's such a great divide between science and faith. i have believed for a long time that science should confirm the existence of God, not question it. that science is used by so many as a way of doubting God's existence, i believe, can be directly attributed to the work of satan to discredit Him.