CMB Signatures of Icosahedral Cosmology: Four Predictions, Four >98% Matches, Zero Free Parameters

We derive four independent predictions for cosmic microwave background observables from icosahedral geometry alone, with no free parameters:

1. Recombination temperature T_rec = E_bind/(53 k_B) where 53 = E + F + D (99.7% match) 

2. Recombination redshift z_rec = 8/α where 8 = F − V (99.5% match) 

3. Cosmic age t₀ = t_H × 19/20 where 19/20 = (F−1)/F (99.6% match)

4. Cosmic birefringence β = 360°/(V² × 7) = 0.357° (98% match to 7σ detection of 0.35°)

The birefringence prediction is particularly significant: ΛCDM predicts β = 0° and cannot explain the observed parity violation without new physics, while icosahedral geometry predicts the exact measured value from structure alone.

We also show that CMB anomalies (low quadrupole, axis of evil, hemispherical asymmetry) are natural consequences of finite icosahedral topology rather than statistical flukes.