A dental group in Ohio runs four clinics. Their AI stack is tidy: one vendor, one knowledge base, two channels — an AI phone agent that answers after-hours calls, and a web chat agent on the booking page. Same pricing doc feeds both. The owner assumed "one knowledge base" meant "one set of answers." It doesn't. Channels are not pipes. Each channel is a generation context , and generation re-invents the answer every time. I pulled 60 conversations from each channel for the same week and so...