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They're so proud of themselves when they think they've found a broken promise in the Bible, or a contradiction, and it's so easy for anybody with an ounce of logical capacity to show that the promise hasn't actually been broken or that the contradiction is only an apparent contradiction. Here's a list of the most common things to consider when confronting an apparent contradiction or broken promise:

A) Time: Just because something hasn't happened yet, doesn't mean it never will. Also, if King A ruled before King B, and some event happened prior to the reign of King A, it ALSO happened prior to the reign of King B.

B) Number: If you have 600 horsemen, you also have 400 horsemen. The term 'more than 2' could refer to the same quantity as 'more than 1,000'.

C) Names: Lots of people have more than one name, and lots of other people have the same name as somebody else.

D) Negatives: Often people will unintentionally convert a negative claim into a positive one. For instance: Jesus said, "You will not have fled to every city in Israel before I return". Many people read this as, "You will have fled to some of the cities of Israel before I return, but not all of them." These two statements might seem equivalent at first, but in the possible case where they don't ever actually flee to another city, the first will hold true, but the second will not.

That's just a few to get you thinking.