Schnelzer’s processual theory deepens this by distinguishing becoming displaceable, feeling displacing and un/doing displacement. Displacement is not a single event. It is a distributed condition that begins before eviction and continues after relocation. It includes vulnerability, anticipation, fear, manoeuvre, adaptation and the gradual reorganisation of everyday life. Elliott-Cooper, Hubbard and Lees call this un-homing: the destruction of home’s conditions before, during and beyond physical movement. Slater’s return to Marcuse insists that displacement must remain central to gentrification theory, not treated as an incidental or difficult-to-measure side effect. KnowledgeFriction emerges because these experiences often exceed available data. A rent increase can be measured. A demolition notice can be archived. But humiliation, anticipatory anxiety, loss of neighbours, symbolic erasure and civic disrespect are harder to count. This does not make them less real. It means urban knowledge must expand its evidentiary forms. DiagonalReading becomes a secondary operator because the problem must be read across categories: housing, affect, law, infrastructure, race, class, data, cartography, public language and bodily exposure.
Data feminism provides a method for this expansion. D’Ignazio and Klein argue that data work must examine power, challenge power, value emotion and embodiment, rethink binaries, embrace pluralism, consider context and make labour visible. This is not an anti-data position. It is a demand for accountable data. Kitchin’s account of data-driven urbanism shows why this matters: sensors, dashboards, algorithms and platforms increasingly shape the city’s governance. If data categories are narrow, the city will be governed narrowly.
De Certeau’s “Walking in the City” offers the classic counter-image. From above, the city appears as a readable totality. At street level, it is written tactically by footsteps, deviations, shortcuts, hesitations and everyday practices. Urban correction must recover this street-level writing. It must contest the view from the tower, the dashboard and the redevelopment render. PublicSyntax becomes essential because correction needs a shared language capable of carrying lived evidence into public debate.
Infrastructure studies add another layer. Larkin’s political aesthetics of infrastructure shows that infrastructure is not only technical function. It organises desire, authority, expectation and sensory life. Roads, cables, stations, grids and switchboxes carry promises. They shape how people imagine the state, progress, abandonment or future inclusion. Wood’s work on maps, art and power similarly shows that cartography is never innocent. Maps mediate relations between institutions, citizens, territories and claims. They make certain worlds appear obvious while rendering others invisible.
ThermalJustice enters this reader because displacement and correction are not only housing questions. Climate exposure, heat, shade, waiting, transit vulnerability and public-space comfort are increasingly part of urban inequality. A person can be displaced from public life by temperature, lack of canopy, hostile surfaces or unsafe waiting conditions. Thermal stress is a correction to abstract accessibility. It reminds us that the city is lived through bodies.
StratumAuthoring, the final secondary operator, names how layers write the field. Cities are authored by accumulated strata: planning regimes, infrastructures, memories, demolitions, repairs, maps, myths, datasets and atmospheres. Socioplastics likewise builds through strata. KnowledgeFriction ensures that such layering does not become smooth self-confirmation. It keeps conflict active. It allows the corpus to encounter evidence that resists its grammar.
For Socioplastics at 6K, this reader is indispensable. A large corpus can produce authority through mass, but mass alone is not truth. The field must remain capable of being corrected by displacement, data injustice, infrastructural violence and lived contradiction. KnowledgeFriction is therefore not an obstacle to coherence. It is the condition of serious coherence. A field that cannot absorb friction becomes ideology. A field that can metabolise friction becomes research.
Bibliography
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D’Ignazio, C. and Klein, L.F. (2020) Data Feminism. Cambridge, MA: MIT Press.
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