Series: When Humans Touch the System - Part 2 Validation isn't a gate; it's a blueprint for communication At first glance, validating input feels simple. Check the format. Reject what doesn’t fit. Move on. But the real world is never that tidy. Users bring context the system cannot see. They reuse fields in unexpected ways. They interpret labels differently. They enter values that are technically valid, but semantically wrong. And often, they do so consistently. This is what