What can you see

What can you see? is the recurring question that guides Karen Weaver’s descent into darkness and changes the meaning of her encounter with the Yrr. At first, seeing means reading instruments; then it means recognizing the living world hidden beyond a narrow beam of light; finally, it becomes a question Weaver cannot answer with confidence. The phrase joins the practical limits of human vision to the larger problem of how one form of life might perceive another.

From instruments to darkness

The question first follows an apparent impossibility: Weaver is flying toward the bottom of the world, surrounded by darkness. Her answer is simply, “Nothing.” But the scene complicates that answer. In the Deepflight submersible series, she can see the red and green flight-control lights, gauges for pressure inside and outside the boat, oxygen use, remaining fuel, speed, and the steepness of the dive. Instruments also test the water’s composition, while sensors report its temperature. She cannot see the surrounding depths, yet she can convert them into numbers and charts.

That distinction matters. The submersible makes its environment legible as data without making it visible in any ordinary sense. The first version of the question therefore separates seeing from knowing: Weaver has access to detailed measurements, but the darkness outside remains. When the question returns, the answer “Not much” is described as an exaggeration. An inner voice argues that human beings persist with an organ—sight—that is bound to fail under these conditions. A beam of light offers only a narrow tunnel, even a prison, and the voice asks whether Weaver wants to see everything. The change is not in the equipment or the darkness; it is in the standard by which seeing is judged.

A descent among the unseen

The question recurs as Weaver stares into the dark during a silent descent at an angle of sixty degrees and a speed of twelve knots. She is already 1,500 metres below the surface. Mick Rubin lies in the neighbouring pod, a corpse carried as a messenger and bearer of hope. The physical details make the submersible’s apparent isolation vivid, but the scene soon challenges the idea that the surrounding world is empty. Weaver encounters a sperm whale, a predator with good eyes; at this depth, sight belongs to creatures adapted to darkness as well as to humans equipped with lights and instruments.

The question then expands into a thought experiment about a street. A person counting the man, woman, dog, and birds initially identifies only a few visible organisms. The fuller inventory includes organisms concealed in trees, feathers, skin, fur, stomachs, and saliva, as well as microbes on human bodies and organic matter suspended in the air. What looks like separate individuals is, at another scale, a mass of life connected at almost no distance from one organism to the next. The passage concludes that the sea is no different. The repeated question has turned from a request to report an image into a test of what a limited observer leaves out.

The human particle

When asked what she is, Weaver answers that she is the only human life-form for miles around, unless Rubin counts, though he is no longer a life-form. The response is immediately overturned by the declaration, “YOU’RE A PARTICLE.” In the context of the street and its imperceptible organisms, the answer does not simply deny Weaver’s humanity. It relocates her: she is one element in a wider living field, not an isolated observer standing outside it.

This shift also follows a reflection on the limits of mathematics as a language of contact. Mathematics gave humanity common ground with the Yrr, but shared formulas do not necessarily produce shared understanding. A formula cannot live in a burrow or tree, be stroked, or bare its teeth when threatened; cultural ways of naming the world also shape what different peoples notice. The question about sight thus presses beyond the distinction between visible and invisible. Even a successful exchange of abstract information may leave the participants unable to grasp one another’s experience.

Unanswered, and answered again

The question returns in the midst of images that place humanity and the Yrr somewhere within a larger whole. Weaver feels exhausted, like a small, sad, lonely particle, and calls out, “Mum? Dad?” The sudden appeal to her parents stands beside the cosmic scale of the image: although the passage has challenged the idea of a solitary human observer, it does not erase her vulnerability or loneliness.

Near the end of the encounter, the question changes slightly: “What can you see? What have you seen?” Weaver answers, “I don’t know.” The uncertainty is followed by the word “GHOSTS,” which leaves the sighting unresolved rather than explaining it. The final movement matters because the recurring prompt has never supplied a stable measure of what counts as seeing. Readings, darkness, unseen organisms, the Yrr, and ghosts occupy different levels of perception, and the text does not collapse them into one clear picture. The question’s force lies in that remainder: Weaver has learned to distrust the narrowness of her view, but that recognition does not make the unknown fully visible.