Nobody’s fully sure what Stonehenge was for. Being okay with open questions is a sign of a grown-up mind.

Some questions have no settled answer, and sitting comfortably with that is harder than it sounds, because an uncertain answer satisfies less than a confident wrong one. Holding a question open means you can keep weighing the evidence instead of picking a story and then defending it. It also keeps you honest about the line between what is known and what is only assumed.

Notice something you have been treating as settled that is not, and let it stay open for a while. Practise saying that nobody knows yet, which is usually the more accurate sentence.