I think the important thing is not to confuse the idea that we have a subjective experience of the universe, and that “that” subjective experience isn’t the universe – it’s a different thing to the actual universe. But nonetheless the universe remains consistent, our subjective experience of the universe matches other people’s subjective experience of the universe, we can all make measurements that agree with each other. And that gives us confidence that there is something objectively real without knowing what it is.
– Answering a question in Is Our Map of The Universe Accurate? with Matt O’Dowd on StarTalk (Youtube)