How Can 96% of the Universe Remain Unobservable?

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Only 4% of the universe is composed of observable ordinary matter, while 23% consists of dark matter and the remaining 73% is dark energy. The claim that 96% of the universe is unobservable stems from a strict definition of 'observed.' Current scientific understanding of dark matter and dark energy remains limited, contributing to this perception. The discussion emphasizes that the unobservable aspects do not directly relate to a Theory of Everything. Overall, the complexities of dark matter and dark energy highlight significant gaps in our understanding of the universe.
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I have a question. Only 4% of the universe is observable, how can that be?
 
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By using an overly strict definition of 'observed'.
 
This is not strictly true. 4% of the universe is made up of ordinary matter, 23% is dark matter and the rest is dark energy. We don't yet have a good understanding of what the last two are.

Bear in mind that this does not have much to do with a Theory of Everything.
 

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