Donald Hoffman's "Fitness Beats Truth" (FBT) theorem proves that evolution selects against veridical perceptions. We mathematically prove FBT using strictly bounded Shannon Rate-Distortion Theory. By analyzing the parallel broadcast channels from the objective world $X$ to the perceptual reconstruction $Y$ and the fitness payoff $F$, we treat the agent as a communication channel with a strictly bounded computational capacity $I(X;Y) \le C$. By defining two orthogonal distortion measures—$d_{truth}(x,y)$ and $d_{fit}(x,a)$—we prove algebraically that an optimal rate-allocation algorithm minimizing $d_{fit}$ over an orthogonal fitness landscape necessitates maximizing the distortion $d_{truth}$. Therefore, FBT is not merely game-theoretic dominance; it is the unique mathematical solution to a bounded rate-distortion optimization problem.
While FBT is proven in evolutionary game theory, we prove it using fundamental Information Theory by evaluating the channel capacity of a conscious agent subjected to dual orthogonal distortion metrics.
Because fitness payoffs $F(X)$ are generically non-monotonic and structurally independent of the objective topology $X$, the landscapes $d_{truth}$ and $d_{fit}$ are mathematically orthogonal.
## 3. Optimal Rate Allocation
The agent must solve a constrained optimization problem: allocate its finite bit-rate $C$ to minimize $D_{fit} = \mathbb{E}[d_{fit}]$.
Because the landscapes are orthogonal, any bits of channel capacity $C$ allocated to reducing $D_{truth}$ (maintaining structural isometry) are necessarily withheld from reducing $D_{fit}$ (mapping the utility peaks).
To survive a competitive evolutionary environment, the agent must allocate $100\%$ of its channel capacity $C$ to minimizing $D_{fit}$. As a direct algebraic consequence, the veridical distortion $D_{truth}$ is forced to its mathematical maximum.
Evolution does not merely discourage truth; it mathematically forbids it via optimal rate-allocation. A system cannot minimize two orthogonal distortion metrics simultaneously through a bounded channel. Fitness necessitates maximal structural distortion.
