Urban phenomena exceed disciplinary boundaries: microclimatic heat is simultaneously an atmospheric measurement, an architectural condition and a form of unequal bodily exposure. Yet conventional interdisciplinarity often assembles experts without testing whether they are examining the same research object. Drawing on Haraway and Stengers, an infrastructure of accountable disagreement should require each method to declare its exclusions and record moments when contrary evidence forces revision. If sensors indicate tolerable temperatures while residents report severe nocturnal heat, testimony should not be dismissed as error. Instead, the object must expand to include indoor retention, immobility, energy poverty and tenancy conditions. The protocol is therefore falsifiable: transdisciplinarity has failed whenever no discipline alters what it accepts as legitimate evidence. Urban knowledge becomes accountable not through consensus, but through traceable institutional transformation. Lloveras, A. (2026) TransEpistemology. LAPIEZA-LAB. Available at: https://doi.org/10.5281/zenodo.18999225.