Believe, believe, and believe

Happy 100th post!

It seems to me that Christians and scientists both become very upset around the word "believe." Here are three possible meanings that word can have:

1. "Do you believe in evolution?" In this question (presumably posed by a creationist), "believe in XYZ" means something like, "to think think idea XYZ is true." But the scientist's answer to this question is always, "No," because that's not what a scientist means when (s)he uses the word "believe." Because the scientist (typically) considers that the theoretical, observational, & experimental research that has gone into developing, confirming, and refining the evolutionary model has been sufficiently rigorous to justifiably warrant (nay, necessitate) a certainty in the model. Belief is not necessary, the scientist says (perhaps in a scoffing tone), because of sufficient supporting evidence.

2. "Do you believe in God?" In this question (presumably posed by a scientist), "believe in XYZ" means something like, "to hold idea XYZ to be true, regardless of a lack of evidence." A Christian would technically answer this question with, "yes," but this is not what Christians mean when they say they "believe in God"---or, if they're feeling specific---when they say they "have faith in God." To paraphrase James's warning, "You believe there is one God. Good for you! Of course, even the demons believe and tremble, and that faith does them no good!" Believing that God exists, Christianity says (perhaps in a chilling tone), gets you nowhere.

3. "Do you believe God?" I am eternally thankful to a good friend from summer project (hosted by what was then known as Campus Crusade for Christ) for pointing out this distinction. When Christians (usually) say that they believe in God, they mean that they "believe God"---"trust God." Far from "belief" in evolution (which is no belief at all), and from ascent to God's existence (which even the Father of Lies admits), Christian belief is an orientation of the heart, mind, and will. Christian belief is "banking our hopes" (thanks to John Piper for that one) on all that Jesus is and all that He has done for us. Trusting God, Christianity says (definitely in a hopeful and eager tone), changes everything.

So, how can we (Christians, scientists, those in the intersection of those sets, and those not in either set) be more careful with the concept of belief?