Alyssa is taking a walk on a nature path near her neighborhood. she carries a compass with her. as she walks along the path, she notices the needle on the compass is occasionally deflected from its original position. if she has not changed the direction she is walking, what is most likely causing the occasional shift in the needle?

Bob: coke is baby pandas.jim: what? how do you figure that coke is baby pandas? bob: because this book says so.jim: how do we know the book is correct? bob: because it says that coke is baby pandas.jim: how does that prove the book's accuracy? bob: because it's statement involving coke and baby pandas is correct, therefore it is accurate.jim: how do we know that it's correct? bob: because we have concluded that the book is accurate, and therefore the statement is correct.therefore, coke is baby pandas.