Jev doesn't hallucinate... but that doesn't mean it's right

September 19, 2026

Now, there's a claim from TypeSafe that deserves a direct challenge: that Jev cannot hallucinate. It may not hallucinate the format. If the developer defines three options, Jev shouldn't invent a fourth. If asked for a probability, it shouldn't respond with a poem. That's useful and prevents many absurd failures

Now, there’s a claim from TypeSafe that deserves a direct challenge: that Jev cannot hallucinate. It may not hallucinate the format. If the developer defines three options, Jev shouldn’t invent a fourth. If asked for a probability, it shouldn’t respond with a poem. That’s useful and prevents many absurd failures we see with text models. But a valid value is not necessarily a correct decision. A system can respond perfectly within a schema and get the meaning wrong. It can choose to allow something when it should block it. It can classify fraud as a legitimate transaction. It can assign excessive confidence to a poor reading of the context. Type safety does not make a decision true.

Full episode: https://youtu.be/Nw7-i-j3cLY

🤖 AI-generated content: the script, voices, and images in this episode were produced using artificial intelligence tools.

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