If we don’t know the answer to a question, why wouldn’t, “I don’t know” be an acceptable answer?
Let’s say we don’t know how the sun keeps shining. Someone then asks you how it does that. Which of the following two answers (other answers are available, but I’m just asking for a comparison of these two) is the better…

The Abrahamic religions may have a big chunk of the world faith market covered, but nope. There are still other religions with other gods out there. They’re all equally unconvincing and likely pretend, of course, but they’re different entities.