Manufacturing guy-at-large.

Sufficiently expert

Added on by Spencer Wright.

From a Paul Graham essay titled "How to be an Expert in a Changing World:"

If you're sufficiently expert in a field, any weird idea or apparently irrelevant question that occurs to you is ipso facto worth exploring.*

* In practice "sufficiently expert" doesn't require one to be recognized as an expert—which is a trailing indicator in any case. In many fields a year of focused work plus caring a lot would be enough.