A concept acquires force when it can travel without pretending to remain identical to itself. Translation, citation, classification, measurement and archival survival are not secondary episodes in the life of knowledge; they are the material operations through which knowledge becomes public, durable and actionable. Jakobson dismantles equivalence by showing that every translation reorganises signs within another code, while Benjamin makes this alteration the very condition of a work’s afterlife: what survives does so by entering a linguistic and historical relation that the original could not complete alone. Hall’s articulation extends the problem into politics, where unity is neither essential nor arbitrary but constructed through contingent connections capable of being made, maintained and broken. Together, these positions describe portability as composition rather than transport. A portable form is a relation condensed enough to move, yet open enough to be recomposed. Bergson’s critique of spatialised time indicates what is lost whenever duration is converted into stable units: movement becomes sequence, qualitative difference becomes measurable interval, and becoming is reorganised as a set of administrable states. Poincaré, however, shows why condensation remains indispensable.
