incomplete knowledge

Incomplete knowledge is a central intellectual condition in Moby-Dick: the effort to understand the whale continually produces classifications, pictures, measurements, and instruments, yet each medium exposes its own failure. Ishmael does not abandon inquiry because certainty is impossible. Instead, he makes incompleteness part of the method, presenting knowledge as a provisional draft shaped by observation, inherited authority, practical experience, and the ocean’s resistance to final explanation.

Cetology as a Provisional System

Ishmael introduces cetology when the Pequod is already launched into the “unshored, harbourless immensities” of the deep, placing the attempt to classify whales against the vastness that makes classification necessary and precarious. He calls his project a “systematized exhibition” of the whale’s broad genera, but immediately describes the task as the classification of chaos. The science is unsettled at its foundation: authorities disagree, and even the question of whether a whale is a fish remains historically disputed. The field therefore does not begin with a stable object and a settled vocabulary; it begins with competing institutions, inherited errors, and an animal that exceeds the categories imposed upon it.

The authority of books is also uneven. Only Beale’s and Bennett’s works are said to present the living Sperm whale with any substantial accuracy, and even their reliable material remains small and chiefly scientific. The life of the Sperm whale, whether treated scientifically or poetically, is still unwritten in its completeness. Ishmael consequently offers his own classification with an explicit limitation: he is “the architect, not the builder.” The distinction matters because it turns incompletion into an honest epistemological principle. A preliminary structure can organize later investigation without pretending that the object has been mastered.

The system’s organizing device is bibliographical rather than anatomically exact. External features such as baleen, humps, fins, and teeth appear promising as classificatory marks, but they recur in irregular combinations across different whales. The Sperm whale and the Humpback whale both have humps, yet their resemblance ends there; the Humpback whale and the Right whale both have baleen, yet that shared feature cannot establish their broader identity. Internal anatomy proves no more dependable. Ishmael therefore sorts whales by their bodily magnitude and assigns them book-like categories such as Folio, Octavo, and Duodecimo. The method is practical rather than final: it makes reference possible precisely because a perfect taxonomy is unavailable.

The unfinished character of this arrangement is openly preserved. Ishmael leaves his cetological system standing like the incomplete Cathedral of Cologne, with its crane still on the uncompleted tower, and calls the entire book “the draught of a draught.” The metaphor rejects the fantasy that a first architect should supply the final capstone. Small structures may be completed by their makers, but grand and truthful ones leave work for posterity. Knowledge remains alive because it remains revisable.

Images, Bodies, and the Failure of Representation

The same problem governs visual representation. Ishmael surveys monstrous pictures of whales produced by ancient sculptors, popular artists, sign-painters, and scientific authorities, arguing that their confidence exceeds their evidence. Frederick Cuvier’s supposed picture of the Sperm whale is dismissed as an object that resembles a squash rather than the animal it claims to depict. The error is not simply individual incompetence; it arises because artists and scientists usually work from inadequate remains or inherited images rather than from the living whale in its element.

A stranded whale is no more a sufficient model than a wrecked ship is a faithful portrait of a ship in motion. At sea, the living Leviathan is partly concealed beneath the water, its enormous bulk unfolding through swells and undulations that cannot be lifted bodily into the air for inspection. Even a young Sperm whale hoisted onto a deck assumes an eel-like, flexible, changing form whose exact expression remains elusive. The conditions of observation alter the object observed, so that the attempt to preserve the whale in a fixed image necessarily loses the movement and environment that make it what it is.

The skeleton offers another apparent route to certainty and fails again. Its bones convey little of the animal’s general shape; the relation between skeleton and living body is compared to the relation between an insect and the chrysalis surrounding it. The side fin contains bones analogous to the fingers of a human hand, but those bones remain hidden inside flesh, while the great flukes leave no adequate skeletal equivalent. A dead structure can be measured in detail and still misrepresent the living magnitude it once supported.

Ishmael therefore concludes that the Leviathan must remain unpainted to the last. One portrait may approach the mark more closely than another, but none can attain considerable exactness. The only tolerable route toward the whale’s living contour is direct whaling experience, and that route carries the danger of being stove and sunk by the very animal one seeks to know. Curiosity is thus entangled with exposure: knowledge of the whale cannot be separated from the peril of entering the whale’s world.

Measurement, Navigation, and the Limits of Instruments

The book’s treatment of instruments extends incomplete knowledge from natural history into navigation and destiny. In the Japanese sea, Ahab uses a quadrant, fitted with coloured glasses, to observe the sun and calculate his latitude on the basis of the instrument’s reading. The quadrant can tell him where the Pequod is at a precise moment, but Ahab recognizes that it cannot reveal where he or anything else will be tomorrow. It locates the observer without disclosing the future or the hidden position of Moby Dick.

Ahab’s response is not quiet acceptance but anger at the gap between measurement and mastery. The quadrant appears powerful because it produces exact figures, yet its exactness concerns only the holder’s present position. It cannot locate a drop of water or a grain of sand at a later time. The instrument’s precision therefore becomes a reminder of its narrow jurisdiction: it measures one relation while leaving the larger field of causation, chance, and intention unknown.

The Pequod’s compasses dramatize the same instability through a physical reversal. After lightning, the needles are found to be inverted. The incident has a natural explanation: electrical energy can damage or annihilate the magnetic virtue of the needle, and the affected condition spreads to the ship’s other compasses. Yet the practical consequence is severe. A device intended to provide direction produces a false one, and the ship must correct its course by taking the sun’s bearing and recognizing the deception of its supposedly reliable instruments.

Whaling experience supplies a contrasting form of knowledge. Nantucket commanders can infer a whale’s probable direction and speed after observing it for several hours, sometimes tracking its unseen course through darkness almost as a pilot tracks an unseen headland. The whale’s wake, normally treated as evanescent, can become nearly as dependable as land for the practiced hunter. But this knowledge remains conditional: wind and sea must cooperate, and skill is useless to a becalmed or windbound mariner. Practical expertise does not abolish uncertainty; it turns experience into a limited, probabilistic form of prediction.

Ecological Scale and the Unfinished World

Incomplete knowledge also shapes the Pequod’s encounters with marine life. In the Crozetts, the crew sails through immense meadows of brit, the minute yellow food of the Right whale, while Right whales move through it with open mouths, filtering the substance through baleen. Later, the Pequod approaches Java and encounters vast herds of Sperm whales. Their aggregation is linked to hunting pressure and collective safety: whales once found in small companies now appear in immense caravans, so that a ship may search for weeks or months without seeing a spout and then suddenly meet what seems like thousands.

This scale unsettles human expectations about population, scarcity, and extinction. The apparent disappearance of whales from familiar grounds does not necessarily prove decline; the animals may have been driven from one coast to another, or gathered in remote and widely separated armies. Whale-bone whales possess Polar citadels where ice and distance make pursuit difficult, while the immense oceanic pasture available to the whale exceeds the spaces that human observers can easily survey. The argument does not establish certainty about the future of the species. It shows instead how partial observation can produce confident but fallible conclusions about an entire living population.

At the centre of the great Sperm-whale host, peaceful social and reproductive activity continues amid the violence of the chase. Starbuck observes the natural line connecting a young whale to its dam, a biological relation that can become entangled with a harpoon line and turn maternal attachment into a trap. The surrounding circles contain both dalliance and slaughter, and wounded whales are driven through the herd by the machinery of pursuit. The scene refuses a single explanatory frame: the whales are animals in an ecological community, objects of commercial hunting, and figures within Ishmael’s meditation on the calm that may persist inside an otherwise turbulent existence.

Knowledge as an Open Endeavor

Ishmael’s examination of the Sperm whale’s skeleton makes the principle explicit. He can claim access to the animal’s interior only because he once dissected a small cub hoisted onto a ship’s deck, not because a full-grown whale can be conveniently opened like a specimen. Even then, the skeleton does not restore the living body. A rib from a whale whose living depth reached at least sixteen feet measures little more than eight feet, conveying only half the true impression of the body’s magnitude; the massive flesh, muscle, blood, bowels, fins, and flukes have vanished from the bones.

The result is not a complete anatomy but a warning against mistaking remains for presence. Only in the heart of danger, amid the eddies of the whale’s angry flukes and on the unbounded sea, can the fully invested whale be encountered as living knowledge. Direct experience is more adequate than detached inspection, but it is also more dangerous, unstable, and difficult to communicate. No single position—scientific, practical, visual, anatomical, or poetic—can contain the animal.

The whale’s scale finally enlarges the act of writing itself. Ishmael says that his handwriting expands with the subject until it seems to require a condor’s quill and Vesuvius as an inkstand. The hyperbole is not ornamental excess alone; it formalizes the pressure exerted by a subject that reaches across sciences, generations, species, empires, and the universe. A mighty theme makes the writer expand toward its bulk, while also exposing the impossibility of matching it. The book becomes an unfinished instrument of approach: expansive enough to register the whale’s magnitude, but honest enough to preserve the distance between representation and the thing represented.