Rational thinking involves using the laws of logic. I hope you don't get bored with some big words, i'll try my best to keep the words nice and small. Rational thinking is basically just nice, thorough thinking. Just look at the evidence and then see which way it points.

     Now, in order for the laws of logic to exist, you need a rational world view, much like the Christian world view.

    Let's look at one of the laws of logic: The law of non-contradiction. For example, you can't be two places at once. Here's one more example: "my car is in the garage and it is not in the garage." This has to be wrong because of the law of non-contradiction. Any rational person would know this law is true. But few people stop to ask, "Why is this law true? Why should there be a law of non-contradiction? Or any laws of reasoning?"

     The Christian can answer these questions. The Christian has an absolute standard for reasoning; our thoughts are to be patterned with God's.

     The laws of logic are God's standard for thinking. Since God is an unchanging, sovereign, spirit, His thoughts would be necessarily abstract, universal, invariant entities. In other words, they are not things we can feel, taste, touch, see, or hear, they apply everywhere, all the time. Without God's unchanging nature, nothing in nature can be unchanging. Therefore, rational reasoning needs the biblical God.

     What do you ask the evolutionist? Ask them this: "Why are the laws of logic true? Why should there be any laws of reasoning?"