Thanks to all for responding. I agree with all of you who believe premise 1 is faulty and that the argument is unsound.
I thought I'd reference Wikipedia to define what is meant by "evidence".
"
Evidence, broadly construed, is anything presented in support of an assertion. "
"Types of legal evidence include
testimony,
documentary evidence, and
physical evidence."
You can get more details from this link:
http://en.wikipedia.org/wiki/Evidence
As I said earlier, I remember my mom and dad telling me that Santa was real and I believed it. Also, I might meet someone and they introduce them self as Steve and I have no reason to doubt them, so I believe it. In like manner, the Holy Spirit may speak to a Christian and reveal a truth. Or my sense of seeing tells me that I see a car...I simply believe that and have no reason to think that I may be imagining things. I have no reason to doubt what I perceive is reality. I think all of these examples could be grouped into a kind of belief known as a "properly basic belief".
I also think that we can come to believe something through sound logical argument. I'm going to assume that no one here would dispute that.
So I'd like to modify p1 from the original found in the OP and see if you think it fixes the argument.
1. People come to believe something by evaluating evidence, logical arguments, or properly basic beliefs.
2. People who are Christians believe that God exists.
3. Therefore, people who are Christians came to believe that God exists by (everything listed in p1).
But if you do not agree with my modified argument, please reply with how
you would modify p1 and thus make the argument sound.