Well, you can review its reasoning. And you can passively learn enough about, say, Rust to know if it's making a good point or not.

Or you will be challenged to define your own epistemic standard: what would it take for you to know if someone is making a good point or not?

For things you don't understand enough to review as comfortably, you can look for converging lines of conclusions across multiple reviews and then evaluate the diff between them.

I've used Claude Code a lot to help translate English to Spanish as a hobby. Not being a native Spanish speaker myself, there are cases where I don't know the nuances between two different options that otherwise seem equivalent.

Maybe I'll ask 2-3 Claude Code to compare the difference between two options in context and pitch me a recommendation, and I can drill down into their claims infinitely.

At no point do I need to go "ok I'll blindly trust this answer".