Kappa-carrageenan solutions cooled under shear produce gels whose elastic modulus depends not on their final composition but on the flow conditions during their formation. A gel stirred gently during the sol-gel transition is measurably stiffer than one stirred vigorously, even though both contain identical molecules at identical concentrations. The material remembers how it was made.
The mechanism operates through a competition between two forces: the shear pulling gel particles apart and the adhesion holding them together. A new dimensionless quantity --- the Adhesion number --- captures this balance. When adhesion dominates, particles aggregate into dense clusters connected by thick bridges, producing a stiff network. When shear dominates, the forming gel fragments into smaller, rounder particles with weaker contacts. The final microstructure is not a function of the present state but of the historical ratio between disruption and cohesion throughout the entire cooling process.
What makes this remarkable is that the resulting behavior mirrors an entirely different class of materials --- attractive particulate dispersions under simple shear. The carrageenan chains are macromolecules, not particles, yet during gelation under flow they organize into structures that obey the same scaling laws as hard colloids in suspension. The material crosses a category boundary. A polymer solution, by the act of gelling under shear, becomes something that behaves as if it were a particle suspension --- without any particles having been added.
The through-claim extends beyond soft matter. Any system that solidifies while being disturbed will encode the disturbance into its structure. The disturbance is not merely endured and forgotten --- it is architecturally incorporated. The process of formation becomes the material's most persistent property, outlasting the conditions that created it. History does not just influence the final state; history becomes the final state.