• Arrow's original paradox was the seller's problem: to sell information you have to reveal it. Patents fixed that by letting an inventor disclose an idea without forfeiting it. The buyer-side version AI creates has no equivalent instrument yet.
• The leak is not your data, it is the exhaust: prompts, tool calls, and above all corrections. A correction is the one thing a rival cannot buy, and it escapes imperceptibly, trace by trace.
• The asymmetry compounds. The vendor learns more about your operation every time you use the product, while you learn almost nothing about what it learned from you.
• Nadella calls the status quo ironic: providers claim fair use to train on public data, then restrict distillation and reserve the right to learn from customer usage. One-way learning pools the value with whoever owns the learning infrastructure.

• distillation — Training a small, cheap model to imitate a big one's outputs, keeping much of the capability at a fraction of the cost.

If you're building with AI at a firm that has proprietary workflows, customer data, or hard-won operational knowledge, every prompt you send is potentially training your competitor's future product. This piece gives you the conceptual vocabulary — and the urgency — to think seriously about what your AI vendor is learning from you.

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