String Theory as a Mathematically Inevitable Consequence: An Argument from Parsimony and the Bootstrap Principle

We present a model of emergent spacetime in which space, time, and all physical fields arise from string dynamics. Strings are not embedded in spacetime — spacetime is strings. Under sufficient compression, strings form a face-centered cubic lattice and undergo a collective phase transition, creating a hollow region bounded by a string-lattice wall obeying Hawking thermodynamics. The wall thickness is governed by the FCC bond percolation threshold, yielding: Δ(M) = ℓ_s · ln(1/p_c) / ln(4GM/ℓ_s). This formula applies at all scales. The Big Bang is proposed as a percolation event — a mechanical fracture of the wall at the percolation threshold. The model makes a falsifiable prediction: gravitational wave echoes at t = 2Δ/c following merger events, currently below detection threshold. All principal limitations are acknowledged explicitly, including the sub-Planck scale of the predicted wall thickness.