Chapter 10: Comparative Judgments on a Single Configuration — An Experiment in Four Verdicts on One House

The previous five chapters have described the machinery of each school in turn. This chapter conducts a thought experiment: hand the very same house over to four schools for judgment, record each one's line of reasoning and conclusion in turn, and then dissect exactly where their disagreements arise. In this experiment, no single school's conclusion is presupposed to be correct—the aim is to display the branching of method, not to adjudicate a winner.

10.1 The Setup

Consider a high-rise residence in an urban compound: sitting zi, facing wu (sitting north, facing south), a standard xia gua facing with no oblique deviation on actual compass measurement; delivered and occupied in 2025, making it a Period Nine house. The external configuration: to the north (behind the sitting side) stands a taller cluster of buildings; to the south (the facing side) is the compound's central landscaped garden, with an ornamental pool, and beyond the pool stands a neighboring building; at the southwest corner is an open-air swimming pool; to the east runs the compound's vehicular access road; the compound's main pedestrian entrance is at the southeast Xun direction, and the main outlet where rainwater collects and drains is at the chen direction, slightly east of due southeast. The unit's own front door is set at the southeast corner. The couple who own the unit were both born in 1980: the husband's life-gua is Kun (a West Four life), and the wife's life-gua is Xun (an East Four life).

10.2 Four Schools' Judgments

The Eight Mansions judgment. Sitting zi makes it a Kan house, an East Four house. Checking the Roaming Years: the unit's front door is at Xun, which for a Kan house is the Life Qi gate, the single most auspicious gate; the master bedroom to the south sits at Prolonged Life, likewise auspicious—under the convention that prioritizes the house (the Yangzhai Sanyao lineage), this is judged an auspicious house. But bringing the life-gua into play changes the picture: the husband's life-gua is Kun, for which the Kan house is Death Cutoff, and the Life Qi gate (Xun) is his Five Ghosts—under the convention that prioritizes the person's fate (the Bazhai Mingjing lineage), this is judged a clash between house and fate for the husband, greatly inauspicious; yet for the wife, whose life-gua is Xun, the Kan direction is her Life Qi and the Xun gate is her Reclining Position, and the very same house is instead supremely auspicious for her. The Eight Mansions school's range of conclusions: anywhere from "supremely auspicious" to "greatly inauspicious," depending on which internal convention is followed and whose fate takes priority.

The Xuankong judgment. A Period Nine zi-mountain, wu-facing house; casting the chart (following the method of 7.6, with mountain and facing swapped): the sitting palace, Kan, receives a Mountain star of 9 and a Facing star of 9—a configuration of Double Stars Meeting the Sitting, flourishing descendants but not wealth. Cross-checking against the external configuration: the tall buildings behind the sitting side gather in the Mountain star 9, so there should be no doubt about flourishing descendants for the current Period; but Double Stars Meeting the Sitting also requires water behind the sitting side as well, and this house's rear is purely solid with no water at all, so the current Period's wealth qi fails to gather. At the facing palace, Li, the Mountain star is 1 and the Facing star is 8: the water feature to the south gathers in the wealth star of the now-receding Period Eight, which will continue fading as Period Nine progresses; beyond the water, the neighboring building happens to gather in Mountain star 1 (the nascent qi of the coming Period One), favoring descendants in the coming Period. The remedy centers on the City Gate: flanking the facing palace, the Xun palace (southeast) has its Period-Chart star 8 entered into the center and flown backward, bringing 9 to Xun—making the Xun direction an empowered, proper city gate; and the compound's main pedestrian entrance happens to be located exactly at Xun. A Xuankong master would judge: the southeast gate and roadway are the current Period's aperture of wealth qi for this house, and should be kept open and flourishing; further overlaying the annual cycle, in 2026, a bingwu year, the annual Five Yellow flies to the Li palace, so renovation or groundbreaking at the southern water feature should be avoided that year. The Xuankong conclusion: flourishing descendants, moderate wealth, which can be boosted via the southeast city gate, with specific favorable and unfavorable years determined separately.

The Sanhe judgment. Sanhe takes the facing and the water outlet as its master rule. This house sets a wu facing, which belongs to the Fire Bureau (yin-wu-xu): casting the Stage of Life from the facing, Birth is at yin, Emperor's Prime is at wu, and the Tomb is at xu, so the ideal water outlet should exit at xu (the tomb-storehouse). But the actual measured water outlet is at chen—for the Fire Bureau, chen is the Cap-and-Girdle direction, so water exiting there from a birth-and-flourishing direction constitutes "breaching the Cap-and-Girdle," a configuration of ruin; alternatively, working backward from the Bureau-fixing method, if the water exits at chen it should properly belong to the Water Bureau (per "xin and ren converge and gather at chen"), in which case this site should properly have been given a sitting-wu-facing-zi, or a kun/shen, or similar Water Bureau facing, so that the current wu facing represents a mismatch between the facing and the water. Both paths converge on the same conclusion: Sanhe judges this house's facing and water to be mismatched—inauspicious. But a second voice would immediately arise within the Sanhe school itself: an urban yang dwelling has no real water at all, so is it even valid to treat the rainwater outlet as "the water outlet"$3 If the vehicular road is instead taken as the water ("taking the road as water"), the road runs from west to east, with its exit to the east, at the mao direction, which is not a storehouse direction for any Bureau—yielding instead an unresolvable, mixed configuration with no fixed Bureau at all. Whichever object is taken to represent the water, the conclusion drifts accordingly—this uncertainty is itself an inherent predicament of the Sanhe model once it enters the city.

The Jinsuo Yuguan judgment. Checking only the sand and water in the eight directions: to the north (1) stand tall buildings—direction one needs sand and gets sand, auspicious, indicating a stable family foundation and benefit to the middle son; to the south (9) is the water feature—direction nine needs water and gets water, auspicious, indicating cultural glory and examination success; to the southwest (2) is the swimming pool—direction two needs sand but instead shows water, inauspicious, judged unfavorable to the lady of the house and the elder mother, with the effect falling on the spleen, stomach, and skin; to the east (3) is the vehicular road—direction three needs sand but shows active water (the road), inauspicious, judged to bring disputes, restlessness, and foot ailments for the eldest son. The Jinsuo Yuguan conclusion: the overall configuration is auspicious but carries two problem points, with the negative effects falling on the wife's health and the eldest son's disputes.

Now consider the interior layout as well; here too the schools go their separate ways: the Eight Mansions school arranges the gate, master bedroom, and stove across the eight interior directions according to the Roaming Years (see 5.5, with the pole point taken within the unit itself); the Xuankong school lays the chart's nine palaces directly over the floor plan, with the master bedroom placed in the palace of the Mountain star's birth-and-flourishing, the stove kept clear of the two-and-five palace, and the study placed where the one-and-four combination falls—this is its general rule for interior layout. As a result, the very same southwest-facing master bedroom is called a Death Cutoff room by the Eight Mansions school (for a Kan house), while the Xuankong school calls it a room of nascent Life Qi under the Mountain star One White (for the Period Nine zi-mountain, wu-facing chart)—the judgments once again point in opposite directions; the Sanhe and Jinsuo Yuguan schools, being primarily concerned with the external configuration, mostly borrow either the Eight Mansions mnemonics or craftsman's measuring systems such as the Lu Ban ruler to fill out their treatment of the interior. The structure of disagreement at the interior-layout level is entirely isomorphic to that at the exterior level, and need not be spelled out again here.

10.3 Sorting Out the Disagreement: Where Exactly Does the Branching Occur

Laying the four verdicts side by side: the Eight Mansions school says "fortune varies by person and by convention"; the Xuankong school says "flourishing descendants, moderate wealth, boostable and salvageable"; the Sanhe school says "facing and water mismatched, inauspicious"; and Jinsuo Yuguan says "the overall configuration is auspicious, with problem points in the southwest and east." Aligning their lines of reasoning step by step, the branching can be seen to occur at four levels:

The first level of branching lies in the selection of variables: the four schools do not even agree on "what the independent variable determining fortune and misfortune is"—is it the matching of person to house, the flourishing or decline of space and time, the alignment of facing and water, or the shapes present in the eight directions$4 The second level lies in the assignment of symbolic attributes: the very same Xun direction is called Life Qi by the Eight Mansions school (with respect to the house) and also Five Ghosts (with respect to the Kun life-gua), is called the City Gate by the Xuankong school, and is called "needs sand, being Four Emerald" by Jinsuo Yuguan—same name, different substance, with no way to translate between them. The third level lies in the definition of the inputs: within an urban context, model inputs such as "the sitting-facing," "the water outlet," and "sand and water" themselves have no uncontested operational definition, and since each school takes its readings differently, their conclusions naturally diverge. The fourth level is the most fundamental of all: the absence of any shared adjudicative procedure—the four schools' verdicts differ, yet there exists no method of testing, acknowledged by all four alike, capable of determining who is correct (the right to interpret whether a judgment is ultimately borne out still rests with each school itself).

Beyond this spatial branching, one further temporal comparison experiment can be added: what happens to the four schools' conclusions if the occupancy date in the example is set back from 2025 to 2015 (Period Eight)$5 The Eight Mansions, Sanhe, and Jinsuo Yuguan schools do not shift at all—their models contain no temporal variable, and their verdicts for 2015 and 2025 are word-for-word identical. Only Xuankong rewrites its chart completely: casting the Period Eight zi-mountain, wu-facing chart (the Period Chart enters 8 into the center; the Mountain Chart takes the sitting palace's Period-Chart star 4 into the center and flies forward; the Facing Chart takes the facing palace's Period-Chart star 3 into the center, and with wu as a Heaven-Cycle yin dragon, flies backward), the Mountain star 8 and Facing star 8 both fly together to the facing palace, Li—the Period Eight zi-mountain, wu-facing house is a Double Stars Meeting the Facing configuration, with the southern water feature gathering in exactly the current Period's flourishing wealth star, and the neighboring building beyond the water gathering in the descendants star as well—an excellent configuration for the current Period, gaining both wealth and descendants together; the very same house, upon entering Period Nine, flips instead into Double Stars Meeting the Sitting, with the flourishing qi shifting to gather behind the sitting side. This in turn raises a genuine practical dispute within the Xuankong school itself: for a household that moved in in 2015, once the change of Period occurs in 2024, does the house's chart automatically switch to being calculated under Period Nine (the "the Heavenly Heart has already turned" position), or does it remain the Period Eight chart established at occupancy until a major renovation changes the heavenly heart (the "one chart holds throughout" position)$6 Both positions coexist, and the verdict branches yet again. This comparison makes the criticism from Section 7.7 concrete: the temporal dimension is Xuankong's greatest theoretical advantage over the other schools, and at the same time the greatest source of division within its own conventions—introducing one variable introduces a whole new field of controversy—and this pattern plays out again and again throughout the modeling history of the principle-and-qi school.

The conclusion of this experiment is therefore not that "the fengshui schools are half right and half wrong," but rather this: the disagreement among the principle-and-qi schools is a disagreement at the level of the model itself, not a discrepancy in the execution of one shared model. The four schools share the overarching framework of "qi—direction—fortune and misfortune," but beneath that framework each has built its own machine, mutually incommensurable with the others. Only once this is understood can one understand the question the next chapter must address—by what, exactly, do the schools, and principle-and-qi and form together, remain bound under the single shared roof called "fengshui"$7