Science assumes that any observation hypothesis or theory may be in error - that is why scientific models keep changing in the face of new information.
Being a creationist means never having to let a silly little thing like evidence change your opinion about something.
In theory, this is true. In practice, when an "accepted" theory is being challenged, the old guard defends it to the point of slandering those that would espouse an alternate theory. Look at the history of relativity and quantum mechanics. These were not dispassion men saying, "OK, you are correct, we accept the new." No, they were fights of immense egos and bitter disputes. Also, new information is sometimes disregarded when it doesn't fit the the current theory, as opposed to disregarding the theory.
Being a creationist means never having to let a silly little thing like evidence change your opinion about something.
Creationist start with the postulates that God created everything and that the Bible is the inerrant word of God, neither of which can be proved by the scientific principle. However, neither can the scientific principle cannot be proved by itself.
I will repeat myself: science is being practiced by fallen man, and will always have presuppositional biases. Anyone claiming to be a dispassionate scientist lies to others and to himself.