Confirmation holism is the idea that all of our beliefs must fit together, like pieces of a puzzle, to form a complete picture. Each belief helps to confirm other beliefs, forming a cohesive and consistent worldview. If we have any beliefs that contradict each other, then our whole worldview could be wrong, so we need to make sure they all fit together. Think of it like a jigsaw puzzle - you need each piece to make the picture complete, and if one piece is missing it won't look right.