Before Language: How Meaning Exists Before Words

This manuscript formalizes the concept of structural substitution: the process by which, when a receiver’s representational capacity is insufficient to reconstruct the relational structure encoded in a signal, the system produces a coherent, stable, and internally consistent alternative Φ̂ rather than an explicit error. The argument proceeds from universally observable phenomena to formal structure, empirical illustration (contract bridge bidding), and cross-domain analysis including medicine, archaeology, and artificial intelligence. The manuscript demonstrates that structural substitution is not a domain-specific failure mode but a general property of information systems in which meaning exceeds reconstructive capacity.